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364-DAY BRIDGE TERM LOAN CREDIT AGREEMENT

Bridge Loan Agreement

364-DAY BRIDGE TERM LOAN CREDIT AGREEMENT | Document Parties: AUSTRALIA & NEW ZEALAND BANKING GROUP | BANCO BILBAO VIZCAYA ARGENTARIA SA | BANCO SANTANDER, SA NEW YORK BRANCH, CREDIT SUISSE, DEUTSCHE BANK | BANK OF AMERICA, N.A. | BANK OF CHINA, LOS ANGELES BRANCH | BANK OF CHINA, NEW YORK BRANCH | BANK OF NEW YORK MELLON | BANK OF NOVA SCOTIA | BANK OF TOKYO-MITSUBISHI UFJ, LTD. | BARCLAYS CAPITAL, CITIBANK, NA | CAPITAL, CITIGROUP GLOBAL MARKETS INC | CHINA (LUXEMBOURG) SA | COMPANY OF THE BANK | DEUTSCHE BANK AG | GOLDMAN SACHS CREDIT PARTNERS LP | Hartford Accident and Indemnity Company | Hartford Investment Management | Hartford Life and Accident Insurance | Hartford Life Insurance Company | Hartford Mutual Funds, Inc | Hartford Series Fund, Inc | HSBC BANK USA, NATIONAL ASSOCIATION | INDUSTRIAL AND COMMERCIAL BANK OF CHINA | IVY Funds, Inc | J.P. MORGAN SECURITIES INC., BANC OF AMERICA SECURITIES LLC, BARCLAYS | JPMORGAN CHASE BANK, NA | MIZUHO CORPORATE BANK, LTD | NORTHERN TRUST COMPANY | PNC BANK, NATIONAL ASSOCIATION | ROYAL BANK OF CANADA | ROYAL BANK OF SCOTLAND PLC, THE | STANDARD CHARTERED BANK | SUMITOMO MITSUI BANKING CORPORATION | TORONTO DOMINION (NEW YORK) LLC | UBS AG | UBS SECURITIES LLC | US BANK, NA You are currently viewing:
This Bridge Loan Agreement involves

AUSTRALIA & NEW ZEALAND BANKING GROUP | BANCO BILBAO VIZCAYA ARGENTARIA SA | BANCO SANTANDER, SA NEW YORK BRANCH, CREDIT SUISSE, DEUTSCHE BANK | BANK OF AMERICA, N.A. | BANK OF CHINA, LOS ANGELES BRANCH | BANK OF CHINA, NEW YORK BRANCH | BANK OF NEW YORK MELLON | BANK OF NOVA SCOTIA | BANK OF TOKYO-MITSUBISHI UFJ, LTD. | BARCLAYS CAPITAL, CITIBANK, NA | CAPITAL, CITIGROUP GLOBAL MARKETS INC | CHINA (LUXEMBOURG) SA | COMPANY OF THE BANK | DEUTSCHE BANK AG | GOLDMAN SACHS CREDIT PARTNERS LP | Hartford Accident and Indemnity Company | Hartford Investment Management | Hartford Life and Accident Insurance | Hartford Life Insurance Company | Hartford Mutual Funds, Inc | Hartford Series Fund, Inc | HSBC BANK USA, NATIONAL ASSOCIATION | INDUSTRIAL AND COMMERCIAL BANK OF CHINA | IVY Funds, Inc | J.P. MORGAN SECURITIES INC., BANC OF AMERICA SECURITIES LLC, BARCLAYS | JPMORGAN CHASE BANK, NA | MIZUHO CORPORATE BANK, LTD | NORTHERN TRUST COMPANY | PNC BANK, NATIONAL ASSOCIATION | ROYAL BANK OF CANADA | ROYAL BANK OF SCOTLAND PLC, THE | STANDARD CHARTERED BANK | SUMITOMO MITSUI BANKING CORPORATION | TORONTO DOMINION (NEW YORK) LLC | UBS AG | UBS SECURITIES LLC | US BANK, NA

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Title: 364-DAY BRIDGE TERM LOAN CREDIT AGREEMENT
Governing Law: New York     Date: 3/12/2009
Industry: Major Drugs     Law Firm: Cadwalader Wickersham;Weil Gotshal     Sector: Healthcare

364-DAY BRIDGE TERM LOAN CREDIT AGREEMENT, Parties: australia & new zealand banking group , banco bilbao vizcaya argentaria sa , banco santander  sa new york branch  credit suisse  deutsche bank , bank of america  n.a. , bank of china  los angeles branch , bank of china  new york branch , bank of new york mellon , bank of nova scotia , bank of tokyo-mitsubishi ufj  ltd. , barclays capital  citibank  na , capital  citigroup global markets inc , china (luxembourg) sa , company of the bank , deutsche bank ag , goldman sachs credit partners lp , hartford accident and indemnity company , hartford investment management , hartford life and accident insurance , hartford life insurance company , hartford mutual funds  inc , hartford series fund  inc , hsbc bank usa  national association , industrial and commercial bank of china , ivy funds  inc , j.p. morgan securities inc.  banc of america securities llc  barclays , jpmorgan chase bank  na , mizuho corporate bank  ltd , northern trust company , pnc bank  national association , royal bank of canada , royal bank of scotland plc  the , standard chartered bank , sumitomo mitsui banking corporation , toronto dominion (new york) llc , ubs ag , ubs securities llc , us bank  na
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                                                                    EXHIBIT 10.1

================================================================================

                              U.S. $22,500,000,000

                    364-DAY BRIDGE TERM LOAN CREDIT AGREEMENT

                           Dated as of March 12, 2009

                                      Among

                                  PFIZER INC.,
                                  as Borrower,

                                       and

                        THE INITIAL LENDERS NAMED HEREIN,
                               as Initial Lenders,

                                       and

                           JPMORGAN CHASE BANK, N.A.,
                            as Administrative Agent,

                                       and

      J.P. MORGAN SECURITIES INC., BANC OF AMERICA SECURITIES LLC, BARCLAYS
    CAPITAL, CITIGROUP GLOBAL MARKETS INC., AND GOLDMAN SACHS CREDIT PARTNERS
                                      L.P.,
                            as Joint Lead Arrangers,

                                       and

 BANCO SANTANDER, S.A. NEW YORK BRANCH, CREDIT SUISSE, DEUTSCHE BANK SECURITIES
 INC., HSBC BANK USA, NATIONAL ASSOCIATION, THE ROYAL BANK OF SCOTLAND PLC, THE
           BANK OF TOKYO-MITSUBISHI UFJ, LTD., AND UBS SECURITIES LLC,
                                  as Arrangers,

                                       and

                         BANC OF AMERICA SECURITIES LLC,
    BARCLAYS CAPITAL, CITIBANK, N.A., AND GOLDMAN SACHS CREDIT PARTNERS L.P.
                           as Joint Syndication Agents

================================================================================

<PAGE>

                                TABLE OF CONTENTS

                                                                            Page

SECTION 1.  DEFINITIONS AND ACCOUNTING MATTERS..............................  1

      1.01  Certain Defined Terms...........................................  1

      1.02  Accounting Terms and Determinations............................. 25

      1.03  Computation of Time Periods..................................... 26

      1.04  Terms Generally................................................. 26

SECTION 2.  AMOUNTS AND TERMS OF THE LOANS.................................. 26

      2.01  Commitments..................................................... 26

      2.02  Making the Loans................................................ 26

      2.03  Use of Proceeds................................................. 27

      2.04  Changes of Commitments.......................................... 27

      2.05  Fees............................................................ 28

      2.06  Repayment of Loans.............................................. 28

      2.07  Interest on Loans............................................... 28

      2.08  Interest Rate Determination..................................... 29

      2.09  Optional Conversion of Loans.................................... 29

      2.10  Optional Prepayments............................................ 30

      2.11  Mandatory Prepayments and Commitment Reductions................. 30

      2.12  Payments and Computations....................................... 31

      2.13  Sharing of Payments Etc......................................... 32

      2.14  Additional Costs................................................ 32

      2.15  Illegality...................................................... 34

      2.16  Taxes........................................................... 34

      2.17  Defaulting Lender............................................... 36

SECTION 3.  CONDITIONS TO EFFECTIVE DATE AND FUNDING DATE................... 36

      3.01  Conditions Precedent to Effective Date.......................... 36

      3.02  Conditions Precedent to the Funding Date........................ 38

SECTION 4.  REPRESENTATIONS AND WARRANTIES.................................. 41

      4.01  Organization; Powers; Binding Effect............................ 41

      4.02  Contravention................................................... 41

      4.03  Authorization................................................... 41

      4.04  Financial Statements; Material Adverse Change................... 41

      4.05  No Omission..................................................... 42

      4.06  Status.......................................................... 43

      4.07  Federal Reserve Regulations..................................... 43

      4.08  Investment Company Status....................................... 43

      4.09  Litigation...................................................... 43

      4.10  Use of Proceeds................................................. 43

      4.11  Solvency........................................................ 43

      4.12  Compliance with Laws............................................ 43

      4.13  Patriot Act..................................................... 43

SECTION 5.  FINANCIAL COVENANTS............................................. 44

SECTION 6.  AFFIRMATIVE COVENANTS........................................... 44

      6.01  Financial Statements; Ratings Change and Other Information...... 44

      6.02  Preservation of Existence....................................... 45

      6.03  Payment of Obligations.......................................... 45

      6.04  Maintenance of Properties; Insurance............................ 46

      6.05  Books and Records; Inspection Rights............................ 46

      6.06  Compliance with Laws............................................ 46

      6.07  Maintenance of Ratings.......................................... 46

SECTION 7.  NEGATIVE COVENANTS.............................................. 47

      7.01  Subsidiary Debt................................................. 47

      7.02  Secured Debt.................................................... 47

      7.03  Restricted Payments............................................. 47

      7.04  Restrictions on Subsidiary Distributions; Negative Pledges...... 48

      7.05  Mergers and Acquisitions; Fundamental Changes................... 49

      7.06  Transactions with Affiliates.................................... 49

SECTION 8.  EVENTS OF DEFAULT............................................... 50

SECTION 9.  THE ADMINISTRATIVE AGENT........................................ 53

      9.01  Authorization and Action........................................ 53

      9.02  Administrative Agent's Reliance, Etc............................ 53

      9.03  JPMorgan and Affiliates......................................... 54

      9.04  Lender Credit Decision.......................................... 54

      9.05  Indemnification................................................. 54

      9.06  Successor Administrative Agent.................................. 54

SECTION 10. MISCELLANEOUS................................................... 55

      10.01 No Waiver; Remedies............................................. 55

      10.02 Notices, Etc.................................................... 55

      10.03 Amendments, Etc................................................. 57

      10.04 Costs and Expenses; Indemnity................................... 58

      10.05 Binding Effect.................................................. 60

      10.06 Assignments and Participations.................................. 60

      10.07 Governing Law................................................... 64

      10.08 Execution in Counterparts....................................... 64

      10.09 Successors and Assigns.......................................... 64

      10.10 Captions........................................................ 64

      10.11 Confidentiality................................................. 64

      10.12 Jurisdiction, Etc............................................... 65

      10.13 Waiver of Jury Trial............................................ 65

      10.14 USA Patriot Act................................................. 65

      10.15 Release of Guarantors........................................... 66

      10.16 No Fiduciary Duty............................................... 66

      10.17 Right of Set-off................................................ 67

<PAGE>

ANNEXES

Annex A       -     Applicable Margin

SCHEDULES

Schedule 1.01 -     Permitted Existing Debt
Schedule 2.01 -     Initial Lenders and Commitments
Schedule 4.05 -     Supplemental Information
Schedule 7.02 -     Existing Liens

EXHIBITS

Exhibit A     -     Form of Note
Exhibit B     -     Form of Notice of Borrowing
Exhibit C     -     Form of Assignment and Acceptance

Exhibit D-1   -     Effective  Date Form of Opinion of  In-house  Counsel to the
                    Borrower
Exhibit D-2   -     Effective  Date Form of Opinion  of New York  Counsel to the
                    Loan Parties
Exhibit D-3   -     Funding  Date Form of  Opinion  of  In-house  Counsel to the
                    Borrower
Exhibit D-4   -     Funding  Date Form of  Opinion  of New York  Counsel  to the
                    Loan Parties
Exhibit E     -     Form of Guaranty Agreement
Exhibit F     -     Form of Solvency Certificate
Exhibit G     -     Form of Compliance Certificate

<PAGE>

            CREDIT AGREEMENT dated as of March 12, 2009 among:

            PFIZER INC., a corporation duly organized and validly existing under
the laws of the State of Delaware (the "Borrower");

            The lenders (the "Initial Lenders") listed on the signature pages
hereof; and

            JPMORGAN CHASE BANK, N.A. ("JPMorgan"), as agent (in such capacity,
together with its successors in such capacity, the "Administrative Agent") for
the Lenders (as hereinafter defined).

            The parties hereby agree as follows:

            Section 1. Definitions and Accounting Matters.

            1.01 Certain Defined Terms. As used herein, the following terms
shall have the following meanings (all terms defined in this Section 1 or in
other provisions of this Agreement in the singular to have the same meanings
when in the plural and vice versa):

            "Accountants" shall have the meaning assigned to that term in
Section 3.02(j).

            "Accounting Change" shall have the meaning assigned to that term in
Section 1.02.

            "Acquired Business" shall mean Wyeth and its Subsidiaries.

            "Acquisition" shall mean the acquisition by the Borrower of the
Acquired Business by the merger of Wagner Acquisition Corp., a direct
wholly-owned Subsidiary of the Borrower, with and into Wyeth pursuant to the
terms of the Merger Agreement.

            "Additional Costs" shall have the meaning assigned to that term in
Section 2.14(a).

            "Adjusted LIBO Rate" shall mean, with respect to any Eurodollar
Borrowing for any Interest Period, an interest rate per annum (rounded upwards,
if necessary, to the next 1/16 of 1%) equal to (a) the LIBO Rate for such
Interest Period multiplied by (b) the Statutory Reserve Rate.

            "Administrative Agent" shall have the meaning assigned to that term
in the introduction hereto.

            "Administrative Agent's Account" shall mean the account of the
Administrative Agent most recently designated by it as such account by notice to
the Lenders and the Borrower.

            "Administrative Questionnaire" shall mean an Administrative
Questionnaire in a form supplied by the Administrative Agent.

            "Affiliate" shall mean, as to any Person, any other Person that,
directly or indirectly, controls, is controlled by or is under common control
with such Person. For purposes of this definition, the term "control" (including
the terms "controlling", "controlled by" and "under common control with") of a
Person means the possession, direct or indirect, of the power to vote 20% or
more of the Voting Stock of such Person or to direct or cause the direction of
the management and policies of such Person, whether through the ownership of
Voting Stock, by contract or otherwise.

            "Agreement" shall mean this Credit Agreement, as amended,
supplemented, extended or otherwise modified from time to time.

            "Applicable Duration Fee Rate" shall mean the rate equal to the rate
set forth below opposite the applicable Duration Fee Payment Date and the
aggregate outstanding principal amount of Loans on such Duration Fee Payment
Date:

--------------------------------------------------------------------------------
Aggregate Outstanding Principal     90 Days        180 Days         270 days
Amount of Loans                    after the       after the        after the
                                 Funding Date     Funding Date     Funding Date

--------------------------------------------------------------------------------
Greater than or equal to            1.50%             2.00%           3.00%
$12,500,000,000

--------------------------------------------------------------------------------
Greater than or equal to            1.00%             1.50%           2.00%
$7,500,000,000 but less than
$12,500,000,000

--------------------------------------------------------------------------------
Less than $7,500,000,000            0.75%             1.25%           1.75%
--------------------------------------------------------------------------------

            "Applicable Lending Office" shall mean, with respect to each Lender,
such Lender's Domestic Lending Office in the case of a Base Rate Loan and such
Lender's Eurodollar Lending Office in the case of a Eurodollar Loan.

            "Applicable Margin" shall have the meaning assigned to that term on
Annex A.

            "Approved Fund" shall mean any Person (other than a natural person)
that is engaged in making, purchasing, holding or investing in bank loans and
similar extensions of credit in the ordinary course of its business and that is
administered or managed by (i) a Lender, (ii) an Affiliate of a Lender or (iii)
an entity or an Affiliate of an entity that administers or manages a Lender.

            "Assignment and Acceptance" shall mean an instrument in
substantially the form of Exhibit C hereto.

            "Bankruptcy Code" shall mean the United States Bankruptcy Code of
1978, as amended from time to time.

            "Base Rate" shall mean, for any day, a rate per annum equal to the
greatest of (a) the Prime Rate in effect on such day, (b) the Federal Funds
Effective Rate in effect on such day plus 1/2 of 1.00% and (c) the Adjusted LIBO
Rate for a one month Interest Period beginning on such day (or if such day is
not a Business Day, the immediately preceding Business Day) plus 1.00%, provided
that, for the avoidance of doubt, the Adjusted LIBO Rate for any day shall be
based on the rate appearing on the Reuters BBA Libor Rates Page 3750 (or on any
successor or substitute page of such page) at approximately 11:00 a.m. London
time on such day. Any change in the Base Rate due to a change in the Prime Rate,
the Federal Funds Effective Rate or the Adjusted LIBO Rate shall be effective
from and including the effective date of such change in the Prime Rate, the
Federal Funds Effective Rate or the Adjusted LIBO Rate, respectively.

            "Base Rate Loan" shall mean a Loan that bears interest as provided
in Section 2.07(a)(i).

            "Board" shall mean the Board of Governors of the Federal Reserve
System of the United States of America.

            "Board of Directors" shall mean the board of directors of the
Borrower.

            "Borrower" shall have the meaning assigned to that term in the
introduction hereto.

            "Borrower's Credit Ratings" shall mean (a) an unsecured long term
obligations rating and commercial paper credit rating of the Borrower from
Moody's and (b) a long term issuer credit rating and a short term issuer credit
rating of the Borrower from S&P.

            "Borrowing" shall mean the borrowing of simultaneous Loans of the
same Type made by each of the Lenders pursuant to Section 2.02.

            "Business Day" shall mean any day (a)on which commercial banks are
not authorized by Law or required to close in New York City, and (b) if such day
relates to any Eurodollar Loan that is also a day on which dealings in U.S.
Dollar deposits are carried out in the London interbank market.

            "Capital Lease" shall mean a lease of (or other agreement conveying
the right to use) real and/or personal property which obligations are required
to be classified and accounted for as a capital lease on a balance sheet of such
Person under generally accepted accounting principles (including Statement of
Financial Accounting Standards No. 13 of the Financial Accounting Standards
Board).

            "Capital Lease Obligations" shall mean, as to any Person, the
obligations of such Person to pay rent or other amounts under a Capital Lease
and, for purposes of this Agreement, the amount of such obligations shall be the
capitalized amount thereof, determined in accordance with generally accepted
accounting principles (including such Statement No. 13).

            "Certain Significant Items" shall mean those items designated as
"Certain Significant Items" in the Financial Report (or successor report) filed
as an exhibit to the Borrower's Annual Reports on Form 10-K or in the
Management's Discussion and Analysis of Financial Condition and Results of
Operations in the Borrower's Quarterly Reports on Form 10-Q, as applicable.

            "Change of Control" shall mean (a) the acquisition of ownership,
directly or indirectly, beneficially or of record, by any Person or group
(within the meaning of the Exchange Act and the rules of the SEC thereunder as
in effect on the date hereof), of Equity Interests representing more than 35% of
the aggregate ordinary voting power represented by the issued and outstanding
Equity Interests of the Borrower; or (b) occupation of a majority of the seats
(other than vacant seats) on the Board of Directors by Persons who were neither
(i) nominated by the Board of Directors nor (ii) appointed by directors so
nominated.

            "Code" shall mean the Internal Revenue Code of 1986, as amended from
time to time.

            "Comfort Letter" shall have the meaning assigned to that term in
Section 3.02(j).

            "Commitment" shall have the meaning assigned to that term in Section
2.01.

            "Commitment Documents" shall mean (i) the Bridge Term Facility
Commitment Letter, dated as of January 25, 2009, as amended from time to time,
among the Borrower and the Joint Lead Arrangers, (ii) the Bridge Term Facility
Additional Arranger Commitment Letter, dated as of February 18, 2009, as amended
from time to time, among the Borrower and the Joint Lead Arrangers and each
Accession Letter (as defined therein) and (iii) the Bridge Term Facility Fee
Letter, dated as of January 25, 2009, as amended from time to time, including
pursuant to the Amendment to Bridge Term Facility Fee Letter, dated as of March
12, 2009, in each case, among the Borrower and the Joint Lead Arrangers.

            "Commitment Termination Date" shall mean the earliest of (a) the
consummation of the Acquisition prior to the Funding Date, (b) the Termination
Date (as defined in, and subject to extension pursuant to the terms of, the
Merger Agreement), (c) December 31, 2009, (d) the abandonment of the Acquisition
or the termination of the Merger Agreement and (e) the date on which the
Commitments are cancelled pursuant to Section 8.

            "Communications" shall have the meaning assigned to that term in
Section 10.02(b)(i).

            "Company Disclosure Letter" shall mean the Parent Disclosure Letter
(as defined in the Merger Agreement) dated January 25, 2009 and delivered by the
Borrower to Wyeth pursuant to the Merger Agreement.

            "Company Material Adverse Effect" shall mean an effect, event,
development, change, state of facts, condition, circumstance or occurrence that
is or would be reasonably expected to be materially adverse to the financial
condition, assets, liabilities, business or results of operations of the
Borrower and its Subsidiaries, taken as a whole; provided, however, that a
Company Material Adverse Effect shall not be deemed to include effects, events,
developments, changes, states of facts, conditions, circumstances or occurrences
arising out of, relating to or resulting from: (A) changes generally affecting
the economy, financial or securities markets or political or regulatory
conditions, to the extent such changes do not adversely affect the Borrower and
its Subsidiaries in a disproportionate manner relative to other participants in
the pharmaceutical or biotechnology industry; (B) changes in the pharmaceutical
or biotechnology industry, to the extent such changes do not adversely affect
the Borrower and its Subsidiaries in a disproportionate manner relative to other
participants in such industry; (C) any change in Law or the interpretation
thereof or GAAP or the interpretation thereof, to the extent such changes do not
adversely affect the Borrower and its Subsidiaries in a disproportionate manner
relative to other participants in such industry; (D) acts of war, armed
hostility or terrorism to the extent such changes do not adversely affect the
Borrower and its Subsidiaries in a disproportionate manner relative to other
participants in the pharmaceutical or biotechnology industry; (E) any change
attributable to the negotiation, execution or announcement of the Acquisition,
including any litigation resulting therefrom, and any adverse change in
customer, distributor, employee, supplier, financing source, licensor, licensee,
sub-licensee, stockholder, co-promotion or joint venture partner or similar
relationships; (F) any failure by the Borrower to meet any internal or published
industry analyst projections or forecasts or estimates of revenues or earnings
for any period (it being understood and agreed that the facts and circumstances
giving rise to such failure that are not otherwise excluded from the definition
of Company Material Adverse Effect may be taken into account in determining
whether there has been, a Company Material Adverse Effect); (G) any change in
the price or trading volume of the common stock of the Borrower on the New York
Stock Exchange (it being understood and agreed that the facts and circumstances
giving rise to such change that are not otherwise excluded from the definition
of Company Material Adverse Effect may be taken into account in determining
whether there has been, a Company Material Adverse Effect); and (H) compliance
with the terms of, or the taking of any action required by, the Merger
Agreement.

            "Company SEC Documents" shall mean all registration statements,
prospectuses, forms, reports, definitive proxy statements, schedules, statements
and documents required to be filed by the Borrower under the Securities Act or
the Exchange Act, as the case may be, together with all certifications required
pursuant to the Sarbanes-Oxley Act and any other documents filed by the Borrower
or any of its Subsidiaries with the SEC, including exhibits and other
information incorporated therein, as they have been supplemented, modified or
amended since the time of filing.

            "Consolidated" shall mean, with respect to any Person, the
consolidation of accounts of such Person and its Subsidiaries in accordance with
GAAP.

            "Consolidated Net Income" shall mean, for any period, the
Consolidated net income (or loss) for such period as reflected in the
Consolidated statements of income, stockholders' equity and cash flows of the
Borrower most recently filed with the SEC; provided, however, that the net
income of any other Person in which the Borrower or a Subsidiary has a joint
interest with a third party (which interest does not cause the net income of
such other Person to be Consolidated into the net income of the Borrower) shall
be included only to the extent of the amount of dividends or distributions paid
to the Borrower or a Subsidiary.

            "Constituent Documents" shall mean, with respect to any Person, (a)
the articles of incorporation, certificate of incorporation, constitution or
certificate of formation (or the equivalent organizational documents) of such
Person, (b) the by-laws or operating agreement (or the equivalent governing
documents) of such Person and (c) any document setting forth the manner of
election or duties of the directors or managing members of such Person (if any)
and the designation, amount or relative rights, limitations and preferences of
any class or series of such Person's Equity Interests.

            "Convert", "Conversion" and "Converted" shall each refer to a
conversion of Loans of one Type into Loans of the other Type pursuant to Section
2.08, 2.09 or 2.15.

            "Covered Subsidiaries" shall mean the Material Subsidiaries and the
Guarantors.

            "Debt" of any Person shall mean the sum of the following (without
duplication): (a) all obligations of such Person for borrowed money, under
Repurchase Agreements, Disqualified Stock or evidenced by bonds, debentures,
notes or other similar instruments (other than any such obligations to the
extent that (i) the liability of such Person is limited solely to the property
or asset financed by such obligations or (ii) such obligations result from the
requirement to return collateral posted to such Person by a counterparty
pursuant to a Hedging Contract); (b) all obligations of such Person to pay the
deferred purchase price of property, assets or services, except trade accounts
payable arising in the ordinary course of business; (c) all Capital Lease
Obligations of such Person (other than any such obligations to the extent that
the liability of such Person is limited solely to the property or asset financed
by such obligations); (d) all Debt of others secured by a Lien on any property
or asset of such Person, whether or not such Debt is assumed by such Person; (e)
all Debt of others Guaranteed by such Person; and (f) all reimbursement
obligations or other obligations (other than contingent obligations) with
respect to bankers' acceptances or letters of credit or similar instruments
created or issued at the request of such Person.

            "Debt Incurrence" shall mean the issuance or the incurrence of any
Debt of the type set forth in clause (a) of the definition of Debt, in each
case, after the date hereof by the Borrower or any of its Subsidiaries as to
which the Borrower or such Subsidiary receives Net Cash Proceeds.

            "Default" shall mean any Event of Default or any event that with
notice or lapse of time or both would become an Event of Default.

            "Defaulting Lender" shall mean any Lender, as reasonably determined
by the Administrative Agent on or prior to the Funding Date, that has (a) failed
to comply with its obligation to fund any portion of its Loans on the Funding
Date, (b) notified the Borrower, the Administrative Agent or any Lender in
writing that it does not intend to comply with any of its funding obligations
under this Agreement or has made a public statement to the effect that it does
not intend to comply with its funding obligations under this Agreement or
generally under other agreements in which it has committed to extend credit, (c)
failed, within three Business Days or prior to the Funding Date, if earlier,
after written request by the Administrative Agent, to confirm that it will
comply with the terms of this Agreement relating to its obligations to fund
prospective Loans; provided that any such Lender shall cease to be a Defaulting
Lender under this clause (c) upon receipt of such confirmation by the
Administrative Agent, (d) otherwise failed to pay over to the Administrative
Agent or any other Lender any other amount required to be paid by it hereunder
within three Business Days of the date when due or prior to the Funding Date, if
earlier, unless the subject of a good faith dispute, or (e) (i) become or is
insolvent or has a parent company that has become or is insolvent or (ii) become
the subject of a bankruptcy or insolvency proceeding, or has had a receiver,
conservator, trustee, administrator, assignee for the benefit of creditors or
similar Person charged with reorganization or liquidation of its business or
custodian, appointed for it, or has taken any action in furtherance of, or
indicating its consent to, approval of or acquiescence in any such proceeding or
appointment or has a parent company that has become the subject of a bankruptcy
or insolvency proceeding, or has had a receiver, conservator, trustee,
administrator, assignee for the benefit of creditors or similar Person charged
with reorganization or liquidation of its business or custodian appointed for
it, or has taken any action in furtherance of, or indicating its consent to,
approval of or acquiescence in any such proceeding or appointment; provided that
a Lender shall not be a Defaulting Lender solely by virtue of the ownership or
acquisition of an Equity Interest in such Lender or a parent company thereof by
a Governmental Authority or an instrumentality thereof; provided further that a
Lender may cease to be a Defaulting Lender pursuant to Section 2.17(a).

            "Designated Equity Issuances" shall mean any issuance or sale of any
Equity Interests (i) pursuant to employee and other benefit plans, stock option
plans, management equity plans, other benefit plans or compensation arrangements
or accommodations for management, directors or employees of the Borrower and its
Subsidiaries existing on the Effective Date or, if after the Effective Date,
established in the ordinary course of business, (ii) by any Subsidiaries of the
Borrower to the Borrower or any other Subsidiary, (iii) constituting
consideration for the Acquisition, (iv) in connection with the exercise of the
Acquired Business' $2 Convertible Preferred Stock, par value $2.50 per share,
outstanding immediately prior to the Effective Time (as defined in the Merger
Agreement), (v) constituting consideration for Designated Investments and (vi)
pursuant to dividend reinvestment plans established for the benefit of the
common stock holders of the Borrower.

            "Designated Financings" shall mean the following Debt of the
Borrower or its Subsidiaries: (a) Sale and Lease-Back Transactions the U.S.
Dollar Equivalent of the Net Cash Proceeds of which (when taken together with
all such Sale and Lease-Back Transactions) do not exceed $100,000,000; (b) Debt
under Securitization Facilities (other than Foreign Securitization Facilities)
the U.S. Dollar Equivalent of the Net Cash Proceeds of which in the aggregate do
not exceed (i) $100,000,000 less (ii) the U.S. Dollar Equivalent of the Net Cash
Proceeds of Dispositions constituting Specified Asset Sales under clause (v) of
that definition, and (c) Debt under Foreign Securitization Facilities the U.S.
Dollar Equivalent of the Net Cash Proceeds of which in the aggregate do not
exceed (i) $750,000,000 less (ii) the U.S. Dollar Equivalent of the Net Cash
Proceeds of Dispositions constituting Specified Asset Sales under clause (vi) of
that definition.

            "Designated Investment" shall mean a Domestic Designated Investment
or a Foreign Designated Investment.

            "Disposition" or "Dispose" shall mean the sale, transfer, license,
lease or other disposition (including any Sale and Lease-Back Transaction) of
any property or assets by any Person (or the granting of any option or other
right to do any of the foregoing), including any sale, assignment, transfer or
other disposal, with or without recourse, of any notes or accounts receivable or
any rights and claims associated therewith; provided that the term "Disposition"
shall not include any loss of or damage to, or any condemnation or other taking
of, any property or assets.

            "Disqualified Stock" shall mean with respect to any Person, any
Equity Interest that, by its terms (or by the terms of any security into which
it is convertible or for which it is exchangeable), or upon the happening of any
event, matures or is mandatorily redeemable, pursuant to a sinking fund
obligation or otherwise, or is exchangeable for Debt of such Person, or is
redeemable at the option of the holder thereof, in whole or in part, on or prior
to the date that is five years after the Original Maturity Date.

            "Domestic Designated Investment" shall mean a Restricted Investment
in a Person organized and existing under the laws of the United States of
America or any public subdivision thereof by the Borrower or any Subsidiary
organized and existing under the laws of the United States of America or any
public subdivision thereof other than the Acquisition.

            "Domestic Lending Office" shall mean, with respect to any Initial
Lender, the office of such Lender specified as its "Domestic Lending Office" in
its Administrative Questionnaire or, with respect to any other Lender, the
office of such Lender specified as its "Domestic Lending Office" in its
Administrative Questionnaire, or such other office of such Lender as such Lender
may from time to time notify the Borrower and the Administrative Agent.

            "Domestic Subsidiary" shall mean a Subsidiary that is not a Foreign
Subsidiary.

            "Duration Fee Payment Date" shall mean each of (i) the date that is
90 days after the Funding Date, (ii) the date that is 180 days after the Funding
Date and (iii) the date that is 270 days after the Funding Date; provided that
if any such date shall not be a Business Day, then such Duration Fee Payment
Date shall be the immediately preceding Business Day.

            "EBITDA" shall mean, with respect to any Person, for any period,
Consolidated Net Income for such Person for such period plus (a) the sum of, in
each case to the extent included in the calculation of such Consolidated Net
Income but without duplication,

            (i) federal, state, local or foreign income Taxes;

            (ii) depreciation or amortization expenses;

            (iii) interest expenses (net of interest income);

            (iv) fees and expenses paid related to the closing of the
Acquisition;

            (v) extraordinary, non-recurring or unusual losses or expenses
(including costs and expenses related to the cost reduction initiative program
announced January 2009, or a substantially similar cost reduction initiative
program created in conjunction with the Acquisition, including termination
costs, exit costs and other implementation costs not to exceed $3,500,000,000 in
the aggregate during the term of this Agreement);

            (vi) costs and expenses related to the integration (both before
acquisition and after) of Wyeth including termination costs, costs to exit
redundant facilities, and other organizational integration costs such as
write-offs of redundant IT systems, accelerated depreciation incurred in
connection with anticipated closures or shortened lives due to acquisition and
costs of integrating data; provided that such costs and expenses do not to
exceed $4,000,000,000 in the aggregate during the term of this Agreement;

            (vii) non-cash purchase accounting charges attributable to any
acquisition including future write-offs of in process research and development
capitalized as part of such acquisition;

            (viii) discontinued operations to the extent segregated in the
Consolidated statements of income, stockholders' equity and cash flows of the
Borrower; and

            (ix) non-cash Certain Significant Items not included above in
clauses (i) through (viii) and cash Certain Significant Items not included above
in clauses (i) through (viii) to the extent such cash items do not exceed
$500,000,000 in the aggregate for any such period,

in each case, for such period, and minus (b) without duplication and to the
extent included in determining such Consolidated Net Income, the sum of all
income or gains attributed to such items for such period; provided that (1) if
the Acquisition or a Material Transaction has occurred during such period,
EBITDA shall be determined for such period on a pro forma basis as if such
Material Transaction or the Acquisition has occurred on the first day of such
period and (2) if the cash consideration for the Acquisition is financed with
proceeds of Permitted Repurchase Debt of the type described in clause (b) of the
definition thereof incurred in the period prior to the consummation of the
Acquisition and the Acquisition has occurred within ten days after the end of
such prior period, EBITDA shall be determined for such prior period on a pro
forma basis as if the Acquisition had occurred on the first day of such prior
period.

            "Effective Date" shall have the meaning assigned to that term in
Section 3.01.

            "Eligible Assignee" shall mean (i) a Lender; (ii) an Affiliate of a
Lender; (iii) a commercial bank organized under the Laws of the United States,
or any State thereof, and having total assets in excess of $10,000,000,000; (iv)
a commercial bank organized under the Laws of any other country that is a member
of the Organization for Economic Cooperation and Development or has concluded
special lending arrangements with the International Monetary Fund associated
with its assets in excess of $10,000,000,000 or its equivalent in the relevant
foreign currency, so long as such bank is acting through a branch or agency
located in the country in which it is organized or another country that is
described in this clause (iv); (v) the central bank of any country that is a
member of the Organization for Economic Cooperation and Development; (vi) a
finance company, insurance company or other financial institution or fund
(whether a corporation, partnership, trust or other entity) that is engaged in
making, purchasing or otherwise investing in commercial loans for its own
account in the ordinary course of its business and having total assets in excess
of $10,000,000,000 or its equivalent in the relevant foreign currency; (vii) any
Approved Fund and (viii) any other Person approved by the Administrative Agent
and, unless an Event of Default shall have occurred and be continuing, the
Borrower, such approval not to be unreasonably withheld or delayed; provided
that none of the Borrower, any Affiliate of the Borrower or an individual shall
qualify as an Eligible Assignee.

            "Equity Interests" shall mean shares of capital stock, partnership
interests, membership interests in a limited liability company, beneficial
interests in a trust or other equity ownership interests in a Person, and any
warrants, options or other rights entitling the holder thereof to purchase or
acquire any such equity interest.

            "Equity Issuance" shall mean any issuance or sale by the Borrower or
any of its Subsidiaries after the date hereof of (i) any of its Equity Interests
or (ii) any other security or instrument representing an Equity Interest (or the
right to obtain any Equity Interest) in the Borrower or any of its Subsidiaries,
in each case, other than Disqualified Stock.

            "ERISA" shall mean the Employee Retirement Income Security Act of
1974, as amended from time to time, and the regulations promulgated and rulings
issued thereunder.

            "ERISA Affiliate" shall mean any Person that for purposes of Title
IV of ERISA is a member of the Borrower's controlled group, or under common
control with the Borrower, within the meaning of Section 414 of the Internal
Revenue Code.

            "ERISA Event" shall mean (a) the occurrence with respect to a Plan
of a reportable event, within the meaning of Section 4043 of ERISA, unless the
30-day notice requirement with respect thereto has been waived by the Pension
Benefit Guaranty Corporation (or any successor) ("PBGC"); (b) the application
for a minimum funding waiver with respect to a Plan; (c) the provision by the
administrator of any Plan of a notice of intent to terminate such Plan, pursuant
to Section 4041(a)(2) of ERISA (including any such notice with respect to a plan
amendment referred to in Section 4041(e) of ERISA); (d) the cessation of
operations at a facility of the Borrower or any of its ERISA Affiliates in the
circumstances described in Section 4062(e) of ERISA; (e) the withdrawal by the
Borrower or any of its ERISA Affiliates from a Multiple Employer Plan during a
plan year for which it was a substantial employer, as defined in Section
4001(a)(2) of ERISA; (f) the conditions set forth in Section 302(f)(1)(A) and
(B) of ERISA to the creation of a lien upon property or assets or rights to
property or assets of the Borrower or any of its ERISA Affiliates for failure to
make a required payment to a Plan are satisfied; (g) the adoption of an
amendment to a Plan requiring the provision of security to such Plan, pursuant
to Section 307 of ERISA; or (h) the termination of a Plan by the PBGC pursuant
to Section 4042 of ERISA, or the occurrence of any event or condition described
in Section 4042 of ERISA that constitutes grounds for the termination of, or the
appointment of a trustee to administer, a Plan.

            "Eurodollar" when used in reference to any Loan or Borrowing, refers
to whether such Loan, or the Loans comprising such Borrowing, are bearing
interest at a rate determined by reference to the Adjusted LIBO Rate.

            "Eurodollar Lending Office" shall mean, with respect to any Lender,
the office of such Lender specified as its "Eurodollar Lending Office" in its
Administrative Questionnaire (or, if no such office is specified, its Domestic
Lending Office), or such other office of such Lender as such Lender may from
time to time notify the Borrower and the Administrative Agent.

            "Events of Default" shall have the meaning assigned to that term in
Section 8.

            "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended.

            "Excluded Taxes" shall mean, with respect to the Administrative
Agent, any Lender or any other recipient of any payment to be made by or on
account of any obligation of the Borrower hereunder or under any other Loan
Document, (a) Taxes imposed on (or measured by) its net income by the United
States of America (including any political subdivision thereof) or by any other
jurisdiction (including any political subdivision of any thereof) under the Laws
of which it is organized, in which its principal office is located or in which
it conducts any business (other than solely on account of the execution and
performance of or the receipt of any payment under, this Agreement or any other
Loan Document) or, in the case of any Lender, in which its Applicable Lending
Office is located, (b) any branch profits taxes imposed by the United States of
America or any comparable Tax imposed by any foreign jurisdiction and (c) in the
case of a Foreign Lender (other than an assignee pursuant to a demand by the
Borrower under Section 10.06(a)), any withholding Tax that is attributable to
such Foreign Lender's failure, inability or ineligibility to furnish
documentation described in Section 2.16(e) establishing that such Foreign Lender
is entitled to complete exemption from withholding Tax, except to the extent the
Administrative Agent's or such Lender's failure is due to a change in Law
occurring after the date on which such Foreign Lender becomes a Lender hereunder
and except to the extent that such Foreign Lender (or its assignor, if any) was
entitled, at the time of designation of a different Applicable Lending Office,
to receive additional amounts from the Borrower with respect to such withholding
Tax pursuant to Section 2.16(a).

            "Federal Funds Effective Rate" shall mean, for any day, the weighted
average (rounded upwards, if necessary, to the next 1/100 of 1%) of the rates on
overnight Federal funds transactions with members of the Federal Reserve System
arranged by Federal funds brokers, as published on the next succeeding Business
Day by the Federal Reserve Bank of New York, or, if such rate is not so
published for any day that is a Business Day, the average (rounded upwards, if
necessary, to the next 1/100 of 1%) of the quotations for such day for such
transactions received by the Administrative Agent from three Federal funds
brokers of recognized standing selected by it.

            "Final Extended Maturity Date" shall mean the date that is 90 days
after the First Extended Maturity Date, provided that, if such date shall not be
a Business Day, the Final Extended Maturity Date shall be the immediately
preceding Business Day.

            "Final Extension Amount" shall mean an amount selected by the
Borrower and set forth in the Final Extension Notice, which amount shall not
exceed the lesser of (i) 10% of the Initial Balance and the (ii) aggregate
outstanding principal amount of the Loans on the Final Extension Date.

            "Final Extension Conditions" shall mean each of the following
conditions: (a) the First Extension Date shall have occurred, (b) the Borrower
shall have given written notice signed by a Financial Officer (the "Final
Extension Notice") to the Administrative Agent not later than 11:00 A.M. (New
York City time) three Business Days before the date of the proposed Final
Extension Date, which notice shall include (i) the Final Extension Amount, (ii)
the proposed Final Extension Date and (iii) a representation and warranty by the
Borrower that on the Final Extension Date, and after giving effect thereto, the
statements in clause (d) below are accurate, (c) the Administrative Agent shall
have received from the Borrower for the account of each Lender an extension fee
equal to 2.00% of the Final Extension Amount and (d) on the Final Extension Date
and after giving effect thereto, the following statements shall be true: (x) the
representations and warranties contained in Section 4 are accurate in all
material respects on and as of such date as if made on and as of such date,
except to the extent such representation and warranties expressly relate to an
earlier date, in which case such representations and warranties shall have been
accurate in all material respects as of such earlier date, (y) since December
31, 2008, a Material Adverse Change has not occurred and (z) no Default has
occurred and is continuing or would result from the occurrence of the Final
Extension Date.

            "Final Extension Date" shall mean the date, on or before the close
of banking business on the First Extended Maturity Date, on which each of the
Final Extension Conditions shall have been satisfied.

            "Financial Officer" shall mean (a) the Senior Vice
President-Controller of the Borrower, (b) the Chief Financial Officer of the
Borrower, (c) the Senior Vice President-Treasurer of the Borrower or (d) any
officer of the Borrower who succeeds to all or substantially all of the
responsibilities of an officer identified in clause (a), (b) or (c) above.

            "First Extended Maturity Date" shall mean the date that is 90 days
after the Original Maturity Date, provided that, if such date shall not be a
Business Day, the First Extended Maturity Date shall be the immediately
preceding Business Day.

            "First Extension Amount" shall mean an amount selected by the
Borrower and set forth in the First Extension Notice, which amount shall not
exceed the lesser of (i) 20% of the Initial Balance and the (ii) aggregate
outstanding principal amount of the Loans on the First Extension Date.

            "First Extension Conditions" shall mean each of the following
conditions: (a) the Funding Date shall have occurred, (b) the Borrower shall
have given written notice signed by a Financial Officer (the "First Extension
Notice") to the Administrative Agent not later than 11:00 A.M. (New York City
time) three Business Days before the date of the proposed First Extension Date,
which notice shall include (i) the First Extension Amount, (ii) the proposed
First Extension Date and (iii) a representation and warranty by the Borrower
that on the First Extension Date, and after giving effect thereto, the
statements in clause (d) below are accurate, (c) the Administrative Agent shall
have received from the Borrower for the account of each Lender an extension fee
equal to 2.00% of the First Extension Amount and (d) on the First Extension Date
and after giving effect thereto, the following statements shall be true: (x) the
representations and warranties contained in Section 4 are accurate in all
material respects on and as of such date as if made on and as of such date,
except to the extent such representation and warranties expressly relate to an
earlier date, in which case such representations and warranties shall have been
accurate in all material respects as of such earlier date, (y) since December
31, 2008, a Material Adverse Change has not occurred and (z) no Default has
occurred and is continuing or would result from the occurrence of the First
Extension Date.

            "First Extension Date" shall mean the date, on or before the close
of banking business on the Original Maturity Date, on which each of the First
Extension Conditions shall have been satisfied.

            "Foreign Designated Investment" shall mean any Restricted Investment
other than a Domestic Designated Investment and the Acquisition.

            "Foreign Lender" shall mean any Lender that is organized under the
laws of a jurisdiction other than the United States of America. For purposes of
this definition, the United States of America, each State thereof and the
District of Columbia shall be deemed to constitute a single jurisdiction.

            "Foreign Securitization Facility" shall mean any Securitization
Facility in which the related property or assets are those of a Foreign
Subsidiary.

            "Foreign Subsidiary" shall mean any Subsidiary that is not organized
under the laws of the United States of America or any public subdivision
thereof.

            "Funding Date" shall have the meaning assigned to that term in
Section 3.02.

            "GAAP" shall mean generally accepted accounting principles in the
United States of America.

            "Governmental Authority" shall mean the government of the United
States of America, any other nation or any political subdivision thereof,
whether state or local, and any agency, authority, instrumentality, regulatory
body, court, central bank or other entity exercising executive, legislative,
judicial, taxing, regulatory or administrative powers or functions of or
pertaining to government.

            "Guarantee" of any Person shall mean any obligation of such Person
directly guaranteeing any Debt of any other Person or otherwise providing for
the payment of any Debt of any Person, provided that the term "Guarantee" shall
not include endorsements for collection or deposits in the ordinary course of
business. The term "Guarantee" used as a verb has a correlative meaning.

            "Guarantors" shall mean, as of the funding on the Funding Date and
after the Funding Date, Wyeth, and each other Subsidiary that signs the Guaranty
Agreement or that becomes a party to the Guaranty Agreement on or after the
Funding Date.

            "Guaranty Agreement" shall mean the guaranty agreement,
substantially in the form of Exhibit E, executed by the Guarantors.

            "Hedging Contracts" shall mean all interest rate contracts, foreign
exchange contracts, currency swap or option agreements, forward contracts,
commodity swap, purchase or option agreements, other commodity price hedging
arrangements and all other similar agreements or arrangements designed to alter
the risks of any Person arising from fluctuations in interest rates, currency
values or commodity prices.

            "Indemnified Taxes" shall mean Taxes other than Excluded Taxes.

            "Indemnitee" shall have the meaning assigned to that term in Section
10.04(c).

            "Information" shall mean all information, documentation or materials
(including the financial statements referred to in Section 3.01(b)) delivered by
the Borrower or at the direction of the Borrower to the Joint Lead Arrangers,
the Administrative Agent or the Lenders (or, in each case, their affiliates or
representatives) in connection with this Agreement.

            "Initial Balance" shall mean the initial aggregate principal amount
of the Loans made on the Funding Date.

            "Initial Lenders" shall have the meaning assigned to that term in
the introduction hereto.

            "Interest Period" shall mean the period commencing on the date of
such Borrowing and ending on the numerically corresponding day in the calendar
month that is one, two, three or six months thereafter, as the Borrower may
elect; provided, that (i) if any Interest Period would end on a day other than a
Business Day, such Interest Period shall be extended to the next succeeding
Business Day unless, in the case of a Eurodollar Borrowing only, such next
succeeding Business Day would fall in the next calendar month, in which case
such Interest Period shall end on the next preceding Business Day and (ii) any
Interest Period that commences on the last Business Day of a calendar month (or
on a day for which there is no numerically corresponding day in the last
calendar month of such Interest Period) shall end on the last Business Day of
the last calendar month of such Interest Period. For purposes hereof, the date
of a Borrowing initially shall be the Funding Date and thereafter shall be the
effective date of the most recent conversion or continuation of such Borrowing.

            "Joint Lead Arrangers" shall mean J.P. Morgan Securities Inc., Banc
of America Securities LLC, Barclays Capital, the investment banking division of
Barclays Bank PLC, Citigroup Global Markets Inc. and Goldman Sachs Credit
Partners L.P.

            "Law" shall mean any federal, state, local, national or
supranational or foreign law (including common law), statute, ordinance, rule,
regulation, Order, code ruling, decree, arbitration award, agency requirement,
license or permit of any Governmental Authority.

            "Lenders" shall mean (i) the Initial Lenders and (ii) each Eligible
Assignee that shall become a party hereto pursuant to Section 10.06(a), (b) or
(c).

            "Leverage Ratio" shall mean, with respect to any Person as of the
last day of any fiscal quarter, the ratio of (a) Specified Debt of such Person
and its Subsidiaries outstanding as of such date to (b) EBITDA for such Person
for the last four fiscal quarter period ending on such date.

            "LIBO Rate" shall mean, with respect to any Eurodollar Borrowing for
any Interest Period, the rate appearing on Reuters BBA Libor Rates Page 3750 (or
on any successor or substitute page of such page providing rate quotations
comparable to those currently provided on such page of such page, as determined
by the Administrative Agent from time to time for purposes of providing
quotations of interest rates applicable to dollar deposits in the London
interbank market) at approximately 11:00 a.m., London time, two Business Days
prior to the commencement of such Interest Period, as the rate for dollar
deposits with a maturity comparable to such Interest Period. In the event that
such rate is not available at such time for any reason, then the "LIBO Rate"
with respect to such Eurodollar Borrowing for such Interest Period shall be the
rate at which dollar deposits of $5,000,000 and for a maturity comparable to
such Interest Period are offered by the principal London office of the
Administrative Agent in immediately available funds in the London interbank
market at approximately 11:00 a.m., London time, two Business Days prior to the
commencement of such Interest Period.

            "Lien" shall mean, with respect to any property or asset, any
mortgage, lien, pledge, charge, security interest or encumbrance of any kind in
respect of such property or asset.

            "Loan" shall have the meaning assigned to that term in Section 2.01.

            "Loan Documents" shall mean, collectively, this Agreement, the
Guaranty Agreement, the Notes and the Commitment Documents.

            "Loan Party" shall mean each of the Borrower, each Guarantor and
each other Subsidiary that executes and delivers a Loan Document.

            "Material Adverse Change" shall mean any material adverse change in
any of (a) the business, condition (financial or otherwise) or results of
operations of the Borrower and its Subsidiaries taken as a whole, (b) the
ability of the Borrower to perform any of its material obligations under this
Agreement or the other Loan Documents, or (c) the rights of or benefits
available to the Lenders or the Administrative Agent under this Agreement or any
other Loan Document.

            "Material Adverse Effect" shall mean an effect that results in or
causes, or could reasonably be expected to result in or cause, a Material
Adverse Change.

            "Material Subsidiary" shall mean any Subsidiary (a) for which the
Consolidated gross revenues for the four fiscal quarter periods ending on the
last day of the most recently ended fiscal quarter of the Borrower for which
financial statements have been delivered pursuant to clauses (a) or (b), as
applicable, of Section 6.01 (or prior to such delivery, as of December 31, 2008)
exceed 5% of the Consolidated gross revenues of the Borrower for such period, in
each case determined in accordance with GAAP, or (b) for which the aggregate
total assets (after intercompany eliminations) as of the last day of the most
recently ended fiscal quarter of the Borrower for which financial statements
have been delivered pursuant to clauses (a) or (b), as applicable, of Section
6.01 (or prior to such delivery, as of December 31, 2008) exceed 5% of the
Consolidated total assets of the Borrower as of such date, in each case
determined in accordance with GAAP.

            "Material Transaction" shall mean (a) any Disposition or series of
related Dispositions by the Borrower or any of its Subsidiaries after the
Effective Date, in each case, involving consideration (including non-cash
consideration) with a fair market value in excess of $100,000,000 or (b) any
Designated Investment after the Effective Date involving consideration
(including non-cash consideration) with a fair market value in excess of
$100,000,000.

            "Merger Agreement" shall mean the Agreement and Plan of Merger,
dated as of January 25, 2009, as amended, supplemented or otherwise modified
from time to time (in each case in accordance with the terms of this Agreement),
among Pfizer Inc., Wagner Acquisition Corp. and Wyeth.

            "Moody's" shall mean Moody's Investor Services, Inc. and any
successor thereto.

            "Multiemployer Plan" shall mean a multiemployer plan, as defined in
Section 4001(a)(3) of ERISA, in respect of which the Borrower or any ERISA
Affiliate could have any obligation or liability, contingent or otherwise.

            "Multiple Employer Plan" shall mean a single employer plan, as
defined in Section 4001(a)(15) of ERISA, that (a) is maintained for employees of
the Borrower or any ERISA Affiliate and at least one Person other than the
Borrower and the ERISA Affiliates or (b) was so maintained and in respect of
which the Borrower or any ERISA Affiliate could have liability under Section
4064 or 4069 of ERISA in the event such plan has been or were to be terminated.

            "Net Cash Proceeds" shall mean, (a) with respect to any Disposition
by the Borrower or any of its Subsidiaries, the aggregate amount of all cash
proceeds (including any cash proceeds received by way of deferred payment of
principal pursuant to a note or installment receivable, purchase price
adjustment, or otherwise, but only as and when received) received by the
Borrower or such Subsidiary in respect of such Disposition, net of (i) all
attorneys' fees, accountants' fees, brokerage, consultant and other customary
fees and commissions, title and recording tax expenses and other fees and
expenses incurred by the Borrower or such Subsidiary in connection with such
Disposition, (ii) all Taxes (including Taxes arising out of the distribution of
such cash proceeds by a Foreign Subsidiary directly to the Borrower or
indirectly to the Borrower by one or more intermediate Subsidiaries or another
Subsidiary organized and existing under the laws of the United States of America
or any public subdivision thereof (such Taxes, "Specified Taxes")) paid or
reasonably estimated to be payable as a result thereof, (iii) any liabilities or
obligations associated with the property or assets Disposed of in such
Disposition and retained, indemnified or insured by the Borrower or any of its
Subsidiaries after such Disposition, including without limitation pension and
other post-employment benefit liabilities, liabilities related to environmental
matters, and liabilities relating to any indemnification obligations associated
with such Disposition, (iv) all payments made, and all installment payments
required to be made, with respect to any obligation (x) that is secured by any
property or assets subject to such Disposition, in accordance with the terms of
any Lien upon such property or assets, or (y) that must by its terms, or in
order to obtain a necessary consent to such Disposition, or by applicable law,
be repaid out of the proceeds from such Disposition, (v) all distributions and
other payments required to be made to minority interest holders in Subsidiaries
or joint ventures as a result of such Disposition, or to any other Person (other
than the Borrower or any of its Subsidiaries) owning a beneficial interest in
the property or assets Disposed of in such Disposition, and (vi) the amount of
any purchase price or similar adjustment (x) claimed by any Person to be owed by
the Borrower or any of its Subsidiaries, until such time as such claim shall
have been settled or otherwise finally resolved or (y) paid or payable by the
Borrower or any of its Subsidiaries, in either case in respect of such
Disposition, (b) with respect to any Property Loss Event, the aggregate amount
of all cash proceeds received by the Borrower and its Subsidiaries, net of
amounts applied or committed to be applied, to the restoration or repair of
damaged property or assets or to the purchase price of replacement property or
assets or other similar property or assets useful in the business of the
Borrower within 180 days after the receipt of such proceeds and net of Taxes,
including Specified Taxes, and (c) with respect to any Equity Issuance or Debt
Incurrence, the aggregate amount of all cash proceeds received by the Borrower
and its Subsidiaries in respect of such Equity Issuance or Debt Incurrence, net
of fees, expenses, costs, underwriting discounts and commissions incurred by the
Borrower and its Subsidiaries in connection therewith and net of taxes paid or
estimated to be payable as a result thereof.

            "Note" shall mean a promissory note of the Borrower payable to the
order of any Lender, in substantially the form of Exhibit A hereto, evidencing
the aggregate indebtedness of the Borrower to such Lender.

            "Notice of Borrowing" shall have the meaning assigned to that term
in Section 2.02(a).

            "Obligations" means the Loans and all other amounts, obligations,
covenants and duties owing by the Borrower or any other Loan Party to the
Administrative Agent, any Lender, any Affiliate of any of them or any
Indemnitee, of every type and description (whether by reason of an extension of
credit, payment of any draft drawn or other payment thereunder, loan, guaranty,
indemnification or otherwise), present or future, arising under this Agreement,
any other Loan Document, whether direct or indirect (including those acquired by
assignment), absolute or contingent, due or to become due, now existing or
hereafter arising and however acquired and whether or not evidenced by any note,
guaranty or other instrument or for the payment of money, including all fees,
interest, charges, expenses, attorneys' fees and disbursements and other sums
chargeable to the Borrower or any other Loan Party under this Agreement and any
other Loan Document.

            "Order" shall mean any order, judgment or injunction.

            "Original Maturity Date" shall mean the date that is 364 days after
the Funding Date, provided that, if such date shall not be a Business Day, the
Original Maturity Date shall be the immediately preceding Business Day.

            "Other Taxes" shall mean any and all present or future stamp or
documentary Taxes or any other excise or property Taxes, charges or similar
levies arising from any payment made hereunder or from the execution, delivery
or enforcement of, or otherwise with respect to, the Loan Documents.

            "Patriot Act" shall mean the USA Patriot Act of 2001 (31 U.S.C. 5318
et seq.).

            "Permanent Financing" shall mean the issuance or incurrence by any
Loan Party of loans, debt facilities (including any repurchase facility), debt
or equity securities, common or preferred equity contributions or other Equity
Interests, for proceeds of up to $22,500,000,000 for the purpose of reducing the
Commitments, repaying the Obligations and/or financing a portion of the
Acquisition that would otherwise be funded by the Loans.

            "Permissible Debt" shall mean Debt for borrowed money or Guarantees
thereof (without duplication) (i) of any Subsidiary that is not a Guarantor in
an aggregate principal amount for all such Subsidiaries for which the U.S.
Dollar Equivalent does not exceed $2,500,000,000, and (ii) of any Foreign
Subsidiary in an aggregate principal amount for all Foreign Subsidiaries for
which the U.S. Dollar Equivalent does not exceed $2,000,000,000.

            "Permitted Commercial Paper" shall mean commercial paper, or
refinancings thereof, issued by the Company in the ordinary course of business
for working capital purposes.

            "Permitted Debt Issuance" shall mean a Debt Incurrence resulting
from (i) Designated Financings, (ii) borrowings under the Revolving Credit
Facility (to the extent not exceeding $5,000,000,000) or this Agreement, (iii)
Permitted Existing Debt and Permitted Refinancings of Permitted Existing Debt,
(iv) Permitted Commercial Paper, (v) Permissible Debt, (vi) Debt of the Borrower
to any Subsidiary or of any Subsidiary to the Borrower or any other Subsidiary
or (vii) Permitted Repurchase Debt.

            "Permitted Existing Debt" shall mean the Debt of the Borrower and
its Subsidiaries set forth on Schedule 1.01 and any Debt of Wyeth or its
Subsidiaries existing on the Funding Date and not incurred in contemplation of
the Acquisition.

            "Permitted Liens" shall mean: (a) Liens imposed by Law for Taxes
that are not yet due or are being contested in compliance with Section 6.03; (b)
carriers', warehousemen's, mechanics', materialmen's, repairmen's and other like
Liens imposed by Law, arising in the ordinary course of business and securing
obligations that are not overdue by more than 30 days (or if more than 30 days
overdue, are unfiled and no other action has been taken to enforce such Liens)
or are being contested in compliance with Section 6.03; (c) pledges and deposits
made in the ordinary course of business (i) in compliance with workers'
compensation, unemployment insurance and other social security laws or
regulations and (ii) securing liability for reimbursement or indemnification
obligations of (including obligations in respect of letters of credit or bank
guarantees for the benefit of) insurance carriers providing property, casualty
or liability insurance to the Borrower or any Subsidiary; (d) deposits to secure
the performance of bids, trade contracts, leases, statutory obligations, surety
and appeal bonds, performance bonds and other obligations of a like nature
(including those to secure health, safety and environmental obligations), in
each case in the ordinary course of business; (e) judgment Liens in respect of
judgments that do not constitute an Event of Default under clause (f) of Section
8; (f) easements, zoning restrictions, rights-of-way and similar encumbrances on
real property imposed by Law or arising in the ordinary course of business that
do not secure any monetary obligations and do not materially detract from the
value of the affected property or interfere with the ordinary conduct of
business of the Borrower or any Material Subsidiary; (g) Liens (i) of a
collection bank on the items in the course of collection, (ii) attaching to
trading accounts or brokerage accounts incurred in the ordinary course of
business, (iii) in favor of a banking or other financial institution arising as
a matter of Law encumbering deposits or other funds maintained with a financial
institution (including the right of set off) and which are customary in the
banking industry, (iv) attaching to other prepayments, deposits or earnest money
in the ordinary course of business and (v) attaching to cash collateral posted
pursuant to a Hedging Contract entered into in the ordinary course of business;
(h) Liens on insurance policies and the proceeds thereof securing the financing
of the premiums with respect thereto; and (i) Liens on specific items of
inventory or other goods and the proceeds thereof securing such Person's
obligations in respect of documentary letters of credit or banker's acceptances
issued or created for the account of such Person to facilitate the purchase,
shipment or storage of such inventory or goods.

            "Permitted Refinancing" shall mean any extension, refinancing,
renewal, replacement or defeasement of any Debt within 6 months of the scheduled
final maturity date of such Debt that (a) does not exceed the principal amount
of such Debt (plus all accrued interest thereon and the amount of all Taxes,
fees, costs, expenses and premiums incurred in connection therewith), (b) is on
the whole on terms no less favorable in all material respects to the Borrower or
any Subsidiary than such Debt or is on terms that are reasonable based on
current market conditions for such Debt, and (c) has a weighted average maturity
and final maturity (measured as of the date of such extension, refinancing,
renewal replacement or defeasance) no shorter than that of such Debt.

            "Permitted Repurchase Debt" shall mean Debt incurred under
Repurchase Agreements (a) with a term of not more than 270 days for securities,
money-market funds, loans or instruments that are classified as long or short
term investments on the Consolidated balance sheet of the Borrower and its
Subsidiaries entered into (i) on reasonable terms and not for speculative
purposes and for aggregate amounts equal to not more than the value of such
securities, money-market funds, loans or instruments as determined by the
Borrower pursuant to its financial reporting policies, (ii) for general
corporate purposes and (iii) with any commercial bank, other financial
institution or investment grade corporation which has a combined capital and
surplus and undivided profits the U.S. Dollar Equivalent of which is not less
than $500,000,000; provided that the aggregate outstanding amount of such Debt
shall not exceed $5,000,000,000 at any one time; provided further, that after
the Funding Date, not more than $1,000,000,000 of such Debt shall be incurred by
the Borrower and its Domestic Subsidiaries and (b) with a term beginning no
sooner than 10 days prior to the Funding Date and expiring not more than 30 days
after the Funding Date for securities, money-market funds, loans or instruments
that are classified as long or short term investments on the Consolidated
balance sheet of the Borrower and its Subsidiaries entered into (i) on
reasonable terms and not for speculative purposes and for aggregate amounts
equal to not more than the value of such securities, money-market funds, loans
or instruments as determined by the Borrower pursuant to its financial reporting
policies, (ii) to directly or indirectly finance the cash consideration for the
Acquisition and (iii) with any commercial bank, other financial institution or
investment grade corporation which has a combined capital and surplus and
undivided profits the U.S. Dollar Equivalent of which is not less than
$500,000,000; provided that the aggregate outstanding amount of such Debt
pursuant to this clause (b) shall not exceed $14,500,000,000 at any one time.

            "Person" shall mean an individual, a corporation, a company, a
voluntary association, a partnership, a trust, a joint venture, a limited
liability company, an unincorporated organization, or a government or any
agency, instrumentality or political subdivision thereof.

            "Plan" shall mean a Single Employer Plan, a Multiple Employer Plan
or a Multiemployer Plan.

            "Platform" shall have the meaning assigned to that term in Section
10.02(b)(ii).

            "Prime Rate" shall mean the rate of interest per annum publicly
announced from time to time by JPMorgan Chase Bank as its prime rate in effect
at its office located at 270 Park Avenue, New York, New York; each change in the
Prime Rate shall be effective from and including the date such change is
publicly announced as being effective.

            "Pro Forma Financials" shall have the meaning assigned to that term
in Section 3.01(b).

            "Property Loss Event" shall mean (a) any loss of or damage to
property or assets of the Borrower or any of its Subsidiaries that results in
the receipt by such Person of proceeds of insurance (other than business
interruption insurance) the U.S. Dollar Equivalent of which exceeds $100,000,000
(individually or in the aggregate) or (b) any taking of property or assets of
the Borrower or any of its Subsidiaries that results in the receipt by such
Person of a compensation payment in respect thereof the U.S. Dollar Equivalent
of which exceeds $100,000,000 (individually or in the aggregate).

            "Purchase Money Debt" shall mean Debt (including industrial revenue
bonds) incurred to finance the acquisition of property or assets and secured by
a Lien on such property or assets.

            "Quarterly Date" shall mean the last day of each March, June,
September and December in each year, the first of which shall be the first such
day after the date hereof; provided that, if any such day is not a Business Day,
then such Quarterly Date shall be the next preceding Business Day.

            "Register" shall have the meaning assigned to that term in Section
10.06(e).

            "Regulation S-X" shall mean Regulation S-X of the Securities Act.

            "Regulations A, D, U and X" shall mean, respectively, Regulations A,
D, U and X of the Board (or any successor), as the same may be amended or
supplemented from time to time.

            "Regulatory Change" shall mean any change after the date of this
Agreement in United States Federal, state or foreign Law or regulations
(including, without limitation, Regulation D) or the adoption or making after
such date of any interpretations, directives or requests applying to a class of
banks, including the Administrative Agent or any Lender, of or under any United
States Federal, state or foreign Law or regulations (whether or not having the
force of Law) by any court or governmental or monetary authority charged with
the interpretation or administration thereof.

            "Repurchase Agreement" shall mean an agreement by the Borrower or
any Subsidiary to sell securities to another Person coupled with an agreement to
purchase such securities from such Person at a specified price on a later date.

            "Required Lenders" shall mean, at any time, Lenders having at least
a 50.1% interest of the Commitments or, if no Commitments are then outstanding,
Lenders owed at least a 50.1% interest of the then aggregate unpaid principal
amount of all outstanding Loans.

            "Requisite Amount" shall have the meaning assigned to that term in
Section 8(e).

            "Reserve Requirement" shall mean, for any Interest Period for all
Eurodollar Loans, the average maximum rate at which reserves (including any
marginal, supplemental or emergency reserves) are required to be maintained
during such Interest Period under Regulation D by member banks of the Federal
Reserve System in New York City with deposits exceeding one billion U.S. Dollars
against "Eurocurrency Liabilities" (as such term is used in Regulation D).
Without limiting the effect of the foregoing, the Reserve Requirement shall
reflect any other reserves required to be maintained by such member banks by
reason of any Regulatory Change against (a) any category of liabilities that
includes deposits by reference to which the LIBO Rate is to be determined or (b)
any category of extensions of credit or other assets that includes Eurodollar
Loans.

            "Restricted Investment" shall have the meaning assigned to that term
in Section 7.05(b).

            "Restricted Payment" shall mean any dividend or other distribution
(whether in cash, securities or other property) with respect to any Equity
Interests in any Person, or any payment (whether in cash, securities or other
property), including any sinking fund or similar deposit, on account of the
purchase, redemption, retirement, acquisition, cancellation or termination of
any such Equity Interests in such Person or any option, warrant or other right
to acquire any such Equity Interests in such Person.

            "Revolving Credit Facility" shall mean the 364 Day Credit Agreement,
dated as of March 9, 2009, among the Borrower, Citibank, N.A., as administrative
agent, and the lenders party thereto as amended, supplemented, modified or
refinanced from time to time.

            "S&P" shall mean Standard & Poor's Ratings Group, a division of The
McGraw Hill Corporation and any successor thereto.

            "Sale and Lease-Back Transaction" shall mean any arrangement
providing for the leasing by the Borrower or any of its Subsidiaries of any real
or tangible personal property, which property has been or is to be sold or
transferred by the Borrower or such Subsidiary to a third Person in
contemplation of such leasing.

            "Sarbanes-Oxley Act" shall mean the Sarbanes-Oxley Act of 2002.

            "SEC" shall mean the United States Securities and Exchange
Commission.

            "Secured Debt" shall mean any Debt under any Repurchase Agreement
and any Debt the obligations with respect to which are secured by a Lien.

            "Securities Act" shall mean the Securities Act of 1933, as amended.

            "Securitization Facility" shall mean, with respect to any Person, a
facility or other arrangement or program providing for the sale, transfer or
conveyance to a Securitization SPV of property or assets in exchange for the
advance of funds to such Person and/or one or more of its Subsidiaries.

            "Securitization SPV" shall mean, with respect to any Person, a
trust, bankruptcy remote entity or other special purpose entity which is a
Subsidiary of such Person (or, if not a Subsidiary, the common equity of which
is wholly owned, directly or indirectly, by such Person) and which is formed for
the purpose of, and engages in no material business other than, acting as an
issuer or a depositor under a Securitization Facility or as an intermediate
transferee and transferor under a Securitization Facility (and, in connection
therewith, in either case, owning property or assets and pledging or
transferring any interests therein).

            "Series A Preferred Stock" shall have the meaning assigned to that
term in Section 7.03.

            "Single Employer Plan" shall mean a single employer plan, as defined
in Section 4001(a)(15) of ERISA, that (a) is maintained for employees of the
Borrower or any ERISA Affiliate and no Person other than the Borrower and the
ERISA Affiliates or (b) was so maintained and in respect of which the Borrower
or any ERISA Affiliate could have liability under Section 4069 of ERISA in the
event such plan has been or were to be terminated.

            "Solvent" shall mean, with respect to any Person as of any date of
determination, that, as of such date, (a) the value of the assets of such Person
(both at fair value and present fair saleable value) is greater than the total
amount of liabilities (including contingent and unliquidated liabilities) of
such Person, (b) such Person is able to pay all liabilities of such Person as
such liabilities mature and (c) such Person does not have unreasonably small
capital. In computing the amount of contingent or unliquidated liabilities at
any time, such liabilities shall be computed at the amount that, in light of all
the facts and circumstances existing at such time, represents the amount that
can reasonably be expected to become an actual or matured liability.

            "Specified Asset Sale" shall mean any Disposition or series of
related Dispositions by the Borrower or any of its Subsidiaries after the
Effective Date not in the ordinary course of business; provided that "Specified
Asset Sale" shall not include (i) a Disposition or series of related permanent
Dispositions the U.S. Dollar Equivalent of the Net Cash Proceeds of which do not
exceed $100,000,000 in the aggregate for such Disposition or series of related
Dispositions, (ii) Dispositions in connection with Sale and Lease-Back
Transactions that are Designated Financings; (iii) Dispositions by Foreign
Subsidiaries to the extent the U.S. Dollar Equivalent of the Net Cash Proceeds
of all such Dispositions does not exceed $500,000,000 in the aggregate, (iv)
Dispositions by the Borrower to a Subsidiary or a Subsidiary to the Borrower or
another Subsidiary, (v) Dispositions (other than those described in clause (iv)
above or clause (vi) below) in connection with Securitization Facilities to the
extent that the U.S. Dollar Equivalent of the Net Cash Proceeds of which in the
aggregate do not exceed (A) $100,000,000 less (B) the aggregate amount of Debt
constituting Designated Financings under clause (b) of the definition thereof,
(vi) Dispositions (other than those described in clause (iv) or clause (v)
above) in connection with Foreign Securitization Facilities to the extent that
the U.S. Dollar Equivalent of the Net Cash Proceeds of which in the aggregate do
not exceed (A) $750,000,000 less (B) the aggregate amount of Debt constituting
Designated Financings under clause (c) of the definition thereof, (vii)
Dispositions of securities, money-market funds, loans and instruments that are
classified as long or short term investments on the Consolidated balance sheet
of the Borrower and its Subsidiaries for the purpose of funding all or a portion
of the cash consideration for the Acquisition and (viii) Dispositions under
transactions for the incurrence of Permitted Repurchase Debt.

            "Specified Debt" shall mean, with respect to the Borrower long term
debt and debt maturing within one year on such day (in each case, of the type
reflected in the Consolidated balance sheet of the Borrower on any date of
determination).

            "Specified Taxes" shall have the meaning assigned thereto in the
clause (a)(ii) of the definition of Net Cash Proceeds.

            "Statutory Reserve Rate" shall mean a fraction (expressed as a
decimal), the numerator of which is the number one and the denominator of which
is the number one minus the aggregate of the maximum reserve percentage
(including any marginal, special, emergency or supplemental reserves) expressed
as a decimal established by the Board to which the Administrative Agent is
subject with respect to the Adjusted LIBO Rate, for eurocurrency funding
(currently referred to as "Eurocurrency Liabilities" in Regulation D). Such
reserve percentage shall include those imposed pursuant to such Regulation D.
Eurodollar Loans shall be deemed to constitute eurocurrency funding and to be
subject to such reserve requirements without benefit of or credit for proration,
exemptions or offsets that may be available from time to time to any Lender
under such Regulation D or any comparable regulation. The Statutory Reserve Rate
shall be adjusted automatically on and as of the effective date of any change in
any reserve percentage.

            "Subsidiary" shall mean, with respect to any Person, any
corporation, partnership, limited liability company or other business entity of
which at least a majority of the outstanding shares of Voting Stock is at the
time directly or indirectly owned or controlled by such Person or one or more of
the Subsidiaries of such Person. Unless the context shall otherwise require,
"Subsidiary" refers to a Subsidiary of the Borrower.

            "Taxes" shall mean any and all present or future taxes, levies,
imposts, duties, deductions, charges , liabilities or withholdings (including
interest, fines, penalties or additions to tax) imposed by any Governmental
Authority.

            "Transaction Documents" shall mean this Agreement, the other Loan
Documents and the Merger Agreement.

            "Type", when used in reference to any Loan or Borrowing, refers to
whether the rate of interest on such Loan, or on the Loans comprising such
Borrowing, is determined by reference to the Adjusted LIBO Rate or the Base
Rate.

            "United States" and "United States Person" shall have the meaning
assigned to that term in Section 7701 of the Code.

            "Unused Commitment Fee Rate" shall mean, as of any date of
determination, a per annum rate equal to the rate set forth below opposite the
applicable Borrower's Credit Rating in effect at such time:

--------------------------------------------------------------------------------
                     Level I     Level II    Level III    Level IV     Level V
--------------------------------------------------------------------------------
Borrower's Credit   AA+/Aa1 or    AA/Aa2      AA-/Aa3       A+/A1      A/A2 or
Ratings               higher                                            lower
--------------------------------------------------------------------------------
Unused                0.25%        0.30%       0.375%       0.50%       0.50%
Commitment Fee
--------------------------------------------------------------------------------

For purposes of determining the Unused Commitment Fee Rate, the applicable
Borrower's Credit Ratings from one of S&P and Moody's will be required to
qualify for the applicable level set forth above; provided that if the higher
applicable Borrower's Credit Rating is more than one Level higher than the other
Borrower's Credit Rating, the Unused Commitment Fee Rate shall be the Level
below the Level corresponding to such higher Borrower's Credit Rating.

            "U.S. Dollar Equivalent" shall mean, (a) with respect to any amount
denominated in U.S. Dollars on any date, such amount, (b) with respect to any
amount denominated in any other currency on any date, the amount of U.S. Dollars
that would be required to purchase such amount of such currency at or about
11:00 A.M., New York City time, on such date, for delivery two Business Days
later, as determined by the Administrative Agent on the basis of the spot
selling rate for the offering of such currency for U.S. Dollars in the New York
foreign exchange market, determinations thereof made in good faith by the
Administrative Agent to be conclusive and binding on the parties in the absence
of manifest error.

            "U.S. Dollars" and "$" shall mean lawful money of the United States
of America.

            "Voting Stock" shall mean Equity Interests of any Person having
ordinary power to vote in the election of members of the board of directors,
managers, trustees or other controlling Persons, of such Person (irrespective of
whether, at the time, Equity Interests of any other class or classes of such
entity shall have or might have voting power by reason of the happening of a
contingency).

            "Wyeth" shall mean Wyeth, a Delaware corporation.

            "Wyeth Disclosure Letter" shall mean the Company Disclosure Letter
(as defined in the Merger Agreement) dated January 25, 2009 and delivered by
Wyeth to the Borrower pursuant to the Merger Agreement.

            "Wyeth Material Adverse Effect" shall mean an effect, event,
development, change, state of facts, condition, circumstance or occurrence that
is or would be reasonably expected to be materially adverse to the financial
condition, assets, liabilities, business or results of operations of Wyeth and
its Subsidiaries, taken as a whole; provided, however, that a Wyeth Material
Adverse Effect shall not be deemed to include effects, events, developments,
changes, states of facts, conditions, circumstances or occurrences arising out
of, relating to or resulting from: (A) changes generally affecting the economy,
financial or securities markets or political or regulatory conditions, to the
extent such changes do not adversely affect Wyeth and its Subsidiaries in a
disproportionate manner relative to other participants in the pharmaceutical or
biotechnology industry; (B) changes in the pharmaceutical or biotechnology
industry, to the extent such changes do not adversely affect Wyeth and its
Subsidiaries in a disproportionate manner relative to other participants in such
industry; (C) any change in Law or the interpretation thereof or GAAP or the
interpretation thereof, to the extent such changes do not adversely affect Wyeth
and its Subsidiaries in a disproportionate manner relative to other participants
in such industry; (D) acts of war, armed hostility or terrorism to the extent
such changes do not adversely affect Wyeth and its Subsidiaries in a
disproportionate manner relative to other participants in the pharmaceutical or
biotechnology industry; (E) any change attributable to the negotiation,
execution or announcement of the Acquisition, including any litigation resulting
therefrom, and any adverse change in customer, distributor, employee, supplier,
financing source, licensor, licensee, sub-licensee, stockholder, co-promotion or
joint venture partner or similar relationships, including as a result of the
identity of the Borrower; (F) any failure by Wyeth to meet any internal or
published industry analyst projections or forecasts or estimates of revenues or
earnings for any period (it being understood and agreed that the facts and
circumstances giving rise to such failure that are not otherwise excluded from
the definition of Wyeth Material Adverse Effect may be taken into account in
determining whether there has been, a Wyeth Material Adverse Effect); (G) any
change in the price or trading volume of the common stock of Wyeth on the New
York Stock Exchange (it being understood and agreed that the facts and
circumstances giving rise to such change that are not otherwise excluded from
the definition of Wyeth Material Adverse Effect may be taken into account in
determining whether there has been, a Wyeth Material Adverse Effect); and (H)
compliance with the terms of, or the taking of any action required by, the
Merger Agreement.

            "Wyeth SEC Documents" shall mean all registration statements,
prospectuses, forms, reports, definitive proxy statements, schedules, statements
and documents required to be filed by Wyeth under the Securities Act or the
Exchange Act, as the case may be, together with all certifications required
pursuant to the Sarbanes-Oxley Act and any other documents filed by Wyeth or any
of its Subsidiaries with the SEC, including exhibits and other information
incorporated therein as they have been supplemented, modified or amended since
the time of filing.

            1.02 Accounting Terms and Determinations. Unless otherwise specified
herein, all accounting terms used herein shall be interpreted, all
determinations with respect to accounting matters hereunder shall be made, and
all financial statements and certificates and reports as to financial matters
required to be furnished to the Administrative Agent or any Lender hereunder
shall be prepared, in accordance with GAAP as in effect from time to time,
applied on a basis consistent with the audited Consolidated financial statements
of the Borrower for the Borrower's fiscal year ended December 31, 2008 (except
for changes concurred with by the Borrower's independent public accountants
("Accounting Change")); provided, however, that (a) to the extent any Accounting
Change would affect the calculation of the Leverage Ratio pursuant of Section 5
of this Agreement, then the Leverage Ratio shall be calculated without giving
effect to the Accounting Change and (b) following any Accounting Change, the
Borrower shall provide the Administrative Agent a reconciliation with respect to
the calculation of the Leverage Ratio before and after giving effect to such
Accounting Change at the time the Borrower is required by Section 6.01(c)(ii) to
deliver the calculations demonstrating compliance with Section 5. Following any
Accounting Change, upon request by the Borrower or Administrative Agent, the
Borrower, Administrative Agent and Required Lenders agree to negotiate in good
faith to amend Section 5 and related definitions to preserve the original intent
thereof in light of the Accounting Change.

            1.03 Computation of Time Periods. In this Agreement in the
computation of periods of time from a specified date to a later specified date,
the word "from" means "from and including" and the words "to" and "until" each
mean "to but excluding"

            1.04 Terms Generally. The definitions set forth or referred to in
Section 1.01 shall apply equally to both the singular and plural forms of the
terms defined. Whenever the context may require, any pronoun shall include the
corresponding masculine, feminine and neuter forms. The words "include,"
"includes" and "including" shall be deemed to be followed by the phrase "without
limitation." All references herein to Articles, Sections, Exhibits and Schedules
shall be deemed references to Articles and Sections of, and Exhibits and
Schedules to, this Agreement unless the context shall otherwise require.

            Section 2. Amounts and Terms of the Loans.

            2.01 Commitments. Each Lender severally agrees, on the terms and
conditions hereinafter set forth, to make a loan (each a "Loan") in U.S. Dollars
to the Borrower on the Funding Date, which shall occur during the period from
the Effective Date until the Commitment Termination Date, in an aggregate amount
not to exceed at any time outstanding (a) the amount set forth opposite such
Lender's name on Schedule 2.01 hereto or (b) if such Lender has entered into any
Assignment and Acceptance, the amount set forth for such Lender in the Register
maintained by the Administrative Agent pursuant to Section 10.06(e), in each
case as such amount may be reduced pursuant to Section 2.04(a) or (b) or Section
2.11 (such Lender's "Commitment"). Amounts of Loans prepaid may not be
reborrowed. Any unused Commitment shall terminate on the earlier of (i) the
funding of the Loans on the Funding Date and (ii) close of banking business on
the Commitment Termination Date.

            2.02 Making the Loans. (a) The Borrowing shall be made on notice,
given not later than (i) in the case of a Base Rate Loan, 11:00 A.M. (New York
City time) one Business Day before the date of the proposed Borrowing (which
shall be a Business Day) and (ii) in the case of a Eurodollar Loan, 11:00 A.M.
(New York City time) three Business Days before the date of the proposed
Borrowing, in each case by the Borrower to the Administrative Agent, which shall
give to each Lender prompt notice thereof on the same Business Day by facsimile
transmission or electronic messaging system. Such notice of the Borrowing (the
"Notice of Borrowing") shall be in writing in substantially the form of Exhibit
B hereto, specifying therein (A) the requested date of the proposed Borrowing
(which shall be a Business Day), (B) the Type of Loans comprising the Borrowing,
(C) the aggregate amount of the Borrowing, (D) in the case of a Borrowing
consisting of Eurodollar Loans, the initial Interest Period for each such Loan,
and (E) the location and number of the Borrower's account to which funds are to
be disbursed. Each Lender shall, before 12:00 Noon (New York City time) on the
date of the Borrowing, make available to the Administrative Agent at the
Administrative Agent's Account, in same day funds, such Lender's ratable portion
of the Borrowing. After the Administrative Agent's receipt of such funds and
upon fulfillment of the applicable conditions set forth in Section 3, the
Administrative Agent will make such funds available to the Borrower by promptly
crediting the amounts so received, in like funds, to an account of the Borrower
or maintained with the Administrative Agent in New York City and designated by
the Borrower in the Notice of Borrowing.

            (b) Anything herein to the contrary notwithstanding, the Borrower
may not select Eurodollar Loans for the Borrowing if the obligation of the
Lenders to make Eurodollar Loans shall then be suspended pursuant to Section
2.08 or 2.15.

            (c) Once received by the Administrative Agent the Notice of
Borrowing shall be irrevocable and binding on the Borrower.

            (d) Unless the Administrative Agent shall have received notice from
a Lender prior to the date of such Borrowing that such Lender will not make
available to the Administrative Agent such Lender's ratable portion of the
Borrowing, the Administrative Agent may assume that such Lender has made such
portion available to the Administrative Agent on the date of such Borrowing in
accordance with Section 2.02(a) and the Administrative Agent may, in reliance
upon such assumption, make available to the Borrower on such date a
corresponding amount. If and to the extent that such Lender shall not have so
made such ratable portion available to the Administrative Agent, such Lender and
the Borrower severally agree (but without duplication) to repay to the
Administrative Agent forthwith on demand such corresponding amount together with
interest thereon, for each day from the date such amount is made available to
the Borrower until the date such amount is repaid to the Administrative Agent,
at the Federal Funds Effective Rate. If such Lender shall repay to the
Administrative Agent such corresponding amount, such amount so repaid shall
constitute such Lender's Loan as part of such Borrowing for purposes of this
Agreement. If the Borrower shall repay to the Administrative Agent such
corresponding amount, such prepayment shall not limit any claim the relevant
Borrower may have against the Lender that failed to make such amount available.

            (e) The failure of any Lender to make the Loan to be made by it as
part of the Borrowing shall not relieve any other Lender of its obligation, if
any, hereunder to make its Loan on the Funding Date, but no Lender shall be
responsible for the failure of any other Lender to make the Loan to be made by
such other Lender on the Funding Date. The Administrative Agent shall have no
obligation to make a Lender's ratable portion of the Borrowing available to the
Borrower if, prior to the Borrowing, such Lender had not made such portion of
the Borrowing available to the Administrative Agent.

            2.03 Use of Proceeds. The proceeds of the Loans shall be used by the
Borrower solely to finance (a) the Acquisition, and (b) the payment of fees and
expenses in connection with the Acquisition.

            2.04 Changes of Commitments. (a) Termination on the Commitment
Termination Date. Unless theretofore reduced to such amount pursuant to Section
2.04(b) or 2.11, the Commitments of the Lenders shall automatically be reduced
to zero on the earlier of (i) the funding of the Loans on the Funding Date and
(ii) the close of banking business on the Commitment Termination Date.

            (b) Ratable Termination or Reduction. The Borrower shall have the
right, at any time or from time to time, upon at least three Business Days'
notice to the Administrative Agent, to terminate in whole or reduce ratably in
part the unused portions of the respective Commitments of the Lenders, provided
that each partial reduction shall be in the minimum amount of $25,000,000 or an
integral multiple of $1,000,000 in excess thereof. The aggregate amount of the
Commitments, once reduced as provided in this Section 2.04(b) or in Section
2.11, may not be reinstated.

            2.05 Fees. (a) Unused Commitment Fee. The Borrower agrees to pay to
the Administrative Agent for the account of each Lender an unused commitment fee
on the daily average amount of such Lender's Commitment, for each day during the
period from the Effective Date until the earlier of the Funding Date and the
Commitment Termination Date at a rate per annum equal to the Unused Commitment
Fee Rate. The accrued unused commitment fee shall be payable in arrears on each
Quarterly Date and, without duplication, on the earlier of the Funding Date and
the Commitment Termination Date.

            (b) Duration Fee. The Borrower agrees to pay to the Administrative
Agent, for the account of each Lender, a duration fee on each Duration Fee
Payment Date in an amount equal to the Applicable Duration Fee Rate times the
aggregate outstanding principal amount of Loans on such Duration Fee Payment
Date.

            (c) Administrative Agent's Fee. The Borrower shall pay to the
Administrative Agent for its own account such fees as may from time to time be
agreed in writing by and between the Borrower and the Administrative Agent.

            2.06 Repayment of Loans. The Borrower hereby promises to pay to the
Administrative Agent, for account of each Lender, the aggregate outstanding
principal amount of the Loans, and the Loans shall mature, on the Original
Maturity Date; provided, however, that if the First Extension Conditions have
been satisfied, only the aggregate outstanding principal amount of the Loans in
excess of the First Extension Amount shall mature on the Original Maturity Date
and the Borrower hereby promises to pay to the Administrative Agent, for account
of each Lender, the remaining aggregate outstanding principal amount of the
Loans, and the Loans shall mature, on the First Extended Maturity Date; provided
further, that if the Final Extension Conditions have been satisfied, only the
aggregate outstanding principal amount of the Loans in excess of the Final
Extension Amount shall mature on the First Extended Maturity Date and the
Borrower hereby promises to pay to the Administrative Agent, for account of each
Lender, the remaining aggregate outstanding principal amount of the Loans, and
the Loans shall mature, on the Final Extended Maturity Date.

            2.07 Interest on Loans. (a) Scheduled Interest. The Borrower shall
pay interest on the unpaid principal amount of each Loan owing to each Lender by
the Borrower from the date of such Loan until such principal amount shall be
paid in full, at the following rates:

                  (i) Base Rate Loans. During such periods as such Loan is a
      Base Rate Loan, a rate per annum equal at all times to the sum of (x) the
      Base Rate in effect from time to time plus (y) the Applicable Margin,
      payable in arrears on each Quarterly Date during such periods and, without
      duplication, on the date such Base Rate Loan shall be Converted or paid in
      full.

                  (ii) Eurodollar Loans. During such periods as such Loan is a
      Eurodollar Loan, a rate per annum equal at all times during each Interest
      Period for such Loan to the sum of (x) the Adjusted LIBO Rate for such
      Interest Period for such Loan plus (y) the Applicable Margin, payable in
      arrears on the last day of such Interest Period and, if such Interest
      Period has a duration of more than three months, on each day that occurs
      during such Interest Period every three months from the first day of such
      Interest Period and, without duplication, on the date such Eurodollar Loan
      shall be Converted or paid in full.

            (b) Default Interest. Upon the occurrence and during the continuance
of an Event of Default, the Borrower shall pay interest on the aggregate unpaid
principal amount of the Loans and the amount of all other Obligations then due
and payable, from the date such amount shall be due until such amount shall be
paid in full, payable in arrears on the date such aggregate amount shall be paid
in full and on demand, at a rate per annum equal at all times to 2.00% per annum
above the rate per annum required to be paid on Base Rate Loans pursuant to
clause (a)(i) above.

            2.08 Interest Rate Determination. (a) Each determination by the


 
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