MANHATTAN PHARMACEUTICALS, INC. FORM OF WARRANT

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES HAVE BEEN ACQUIRED FOR INVESTMENT AND MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS, OR AN OPINION OF COUNSEL, IN A FORM ACCEPTABLE TO THE COMPANY, THAT REGISTRATION IS NOT REQUIRED UNDER SAID ACT OR APPLICABLE STATE SECURITIES LAWS OR UNLESS SOLD PURSUANT TO RULE 144 UNDER SAID ACT.

Manhattan Pharmaceuticals, Inc., a Delaware corporation (the “ Company ”), hereby certifies that, for value received, [ l ] or its Permitted Transferees (as hereinafter defined) (the “ Holder ”), is entitled to purchase from the Company up to a total of 5,175,010 shares of common stock, $0.001 par value per share (the “ Common Stock ”), of the Company (each such share, a “ Warrant Share ” and all such shares issuable under the warrants, the “ Warrant Shares ”) at an exercise price of $0.09 (as adjusted from time to time as provided in Section 9 , the “ Exercise Price ”), at any time and from the date hereof and through December 31, 2013 (the “ Expiration Date ”), and subject to the following terms and conditions. This Warrant (“ Warrant ”) is one of a series of similar Warrants issued pursuant to that certain Placement Agency Agreement, dated as of October 21, 2008, by and among the Company and [ l ] (the “ Placement Agency Agreement ”). All such warrants are referred to herein, collectively, as the “ Warrants ” and the holders thereof (as well as any subsequent Permitted Transferee) along with the Holder named herein, the “ Holders .”

1.   Definitions . In addition to the terms defined elsewhere in this Warrant, capitalized terms that are not otherwise defined herein have the meanings given to such terms in the Placement Agency Agreement.

2.   Registration of Warrant . The Company shall register this Warrant, upon records to be maintained by the Company for that purpose (the “ Warrant Register ”), in the name of the record Holder hereof from time to time. The Company may deem and treat the registered Holder of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or any distribution to the Holder, and for all other purposes, absent actual notice to the contrary.

3.   Registration of Transfers . The Company shall register the transfer and/or assignment of any portion of this Warrant (a “ Permitted Transferee ”) in the Warrant Register, upon surrender of this Warrant, with the Form of Assignment attached hereto duly completed and signed, to the Company’s transfer agent or to the Company at its address specified herein. Upon any such registration or transfer, a new warrant to purchase Common Stock, in substantially the form of this Warrant (any such new warrant, a “ New Warrant ”), evidencing the portion of this Warrant so transferred shall be issued to the Permitted Transferee and a New Warrant evidencing the remaining portion of this Warrant not so transferred, if any, shall be issued to the transferring Holder. The acceptance of the New Warrant by the Permitted Transferee thereof shall be deemed the acceptance by such Permitted Transferee of all of the rights and obligations of a holder of a Warrant.

4.   Exercise and Duration of Warrants .

(a)   This Warrant shall be exercisable by the registered Holder at any time and from time to time on or after the date hereof to and including the Expiration Date. At 5:00 P.M., New York City time on the Expiration Date, the portion of this Warrant not exercised prior thereto shall be and become void and of no value and this Warrant shall be terminated and no longer be outstanding.

(b)   The Holder may exercise this Warrant by delivering to the Company (i) an exercise notice, in the form attached hereto (the “ Exercise Notice ”), appropriately completed and duly signed, and (ii) payment of the Exercise Price for the number of Warrant Shares as to which this Warrant is being exercised (which may take the form of a “cashless exercise” if so indicated in the Exercise Notice pursuant to Section 10 below), and the date such items are delivered to the Company (as determined in accordance with the notice provisions hereof) is an “ Exercise Date .”

(c)   Exercise Disputes . In the case of any dispute with respect to the number of shares to be issued upon exercise of this Warrant, the Company shall promptly issue such number of shares of Common Stock that is not disputed and shall submit the disputed determinations or arithmetic calculations to the Holder via fax (or, it the Holder has not provided the Company with a fax number, by overnight courier) within five (5) Business Days of receipt of the Holder’s election to purchase Warrant Shares. If the Holder and the Company are unable to agree as to the determination of the Exercise Price within five (5) Business Days of such disputed determination or arithmetic calculation being submitted to the Holder, then the Company shall in accordance with this Section, submit via facsimile the disputed determination to its independent auditor. The Company shall cause its independent auditor to perform the determinations or calculations and notify the Company and the Holder of the results promptly, in writing and in sufficient detail to give the Holder and the Company a clear understanding of the issue. The determination by the Company’s independent auditor shall be binding upon all parties absent manifest error. The Company shall then on the next Business Day instruct its transfer agent to issue certificate(s) representing the appropriate number of Warrant Shares of Common Stock in accordance with the independent auditor’s determination and this Section. The prevailing party shall be entitled to reimbursement of all fees and expenses of such determination and calculation. For the purposes hereof, the term “ Business Day ” means any day on which banks located in New York City are not required or authorized by law to remain closed.

5.   Delivery of Warrant Shares .

(a)   Upon exercise of this Warrant, the Company shall promptly (but in no event later than five (5) Trading Days after the Exercise Date) issue or cause to be issued and cause to be delivered to or upon the written order of the Holder and in such name or names as the Holder may designate, a certificate for the Warrant Shares to which the Holder is entitled upon such exercise, free of restrictive legends unless a registration statement covering the resale of the Warrant Shares and naming the Holder as a selling stockholder thereunder is not then effective and the Warrant Shares are not freely transferable pursuant to Rule 144 under the Securities Act of 1933, as amended (the “ Securities Act ”). To the extent the Warrant Shares may be issued free of restrictive legends as set forth above, upon request of the Holder, the Company shall use its best efforts to deliver Warrant Shares hereunder electronically through the Depository Trust Corporation or another established clearing corporation performing similar functions. For the purposes hereof, the term “ Trading Day ” means (a) any day on which the Common Stock is listed or quoted and traded on its primary trading market and/or quotation system, as the case may be, (b) if the Common Stock is not then listed or quoted and traded on any trading market, then a day on which trading occurs on the Nasdaq Global Market (or any successor thereto), or (c) if trading ceases to occur on the Nasdaq Global Market (or any successor thereto), any Business Day.

(b)   This Warrant is exercisable, either in its entirety or, from time to time, for a portion of the number of Warrant Shares. Upon surrender of this Warrant following one or more partial exercises, the Company shall issue or cause to be issued, at its expense, a New Warrant evidencing the right to purchase the remaining number of Warrant Shares.

(c)   The Company’s obligations to issue and deliver Warrant Shares in accordance with the terms hereof are absolute and unconditional, irrespective of any action or inaction by the Holder to enforce the same, the recovery of any judgment against any Person or any action to enforce the same, or any setoff, counterclaim, recoupment, limitation or termination, or any breach or alleged breach by the Holder or any other Person of any obligation to the Company or any violation or alleged violation of law by the Holder or any other Person, and irrespective of any other circumstance which might otherwise limit such obligation of the Company to the Holder in connection with the issuance of Warrant Shares. Nothing herein shall limit a Holder’s right to pursue any other remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or injunctive relief with respect to the Company’s failure to timely deliver certificates representing shares of Common Stock upon exercise of the Warrant as required pursuant to the terms hereof. For the purposes hereof, the term “ Person ” means an individual, entity, corporation, partnership, association, limited liability company, limited liability partnership, joint-stock company, trust or unincorporated organization.

6.   Charges, Taxes and Expenses . Issuance and delivery of certificates for shares of Common Stock upon exercise of this Warrant shall be made without charge to the Holder for any issue or transfer tax, withholding tax, transfer agent fee or other incidental tax or expense in respect of the issuance of such certificates, all of which taxes and expenses shall be paid by the Company; provided , however , that the Company shall not be required to pay any tax which may be payable in respect of any transfer involved in the registration of any certificates for Warrant Shares or Warrants in a name other than that of the Holder. The Holder shall be responsible for all other tax liability that may arise as a result of holding or transferring this Warrant or receiving Warrant Shares upon exercise hereof.

7.   Replacement of Warrant . If this Warrant is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in exchange and substitution for and upon cancellation hereof, or in lieu of and substitution for this Warrant, a New Warrant, but only upon receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction and customary and reasonable bond or indemnity, if requested. Applicants for a New Warrant under such circumstances shall also comply with such other reasonable regulations and procedures and pay such other reasonable third-party costs as the Company may prescribe.

8.   Reservation of Warrant Shares . The Company covenants that it will at all times reserve and keep available out of the aggregate of its authorized but unissued and otherwise unreserved Common Stock, solely for the purpose of enabling it to issue Warrant Shares upon exercise of this Warrant as herein provided, the number of Warrant Shares which are then issuable and deliverable upon the exercise of this entire Warrant, free from preemptive rights or any other contingent purchase rights of persons other than the Holder (after giving effect to the adjustments and restrictions of Section 9 , if any). The Company covenants that all Warrant Shares so issuable and deliverable shall, upon issuance and the payment of the applicable Exercise Price in accordance with the terms hereof, be duly and validly authorized, issued and fully paid and nonassessable. The Company will take all such action as may be necessary to assure that such shares of Common Stock may be issued as provided herein without violation of any applicable law or regulation, or of any requirements of any securities exchange or automated quotation system upon which the Common Stock may be listed.

9.   Certain Adjustments . The Exercise Price and number of Warrant Shares issuable upon exercise of this Warrant are subject to adjustment from time to time as set forth in this Section 9 .

(a)   Stock Dividends and Splits . If the Company, at any time while this Warrant is outstanding, (i) pays a stock dividend on its Common Stock or otherwise makes a distribution on any class of capital stock that is payable in shares of Common Stock, (ii) subdivides outstanding shares of Common Stock into a larger number of shares, or (iii) combines outstanding shares of Common Stock into a smaller number of shares, then in each such case the Exercise Price shall be multiplied by a fraction of which the numerator shall be the number of shares of Common Stock outstanding immediately before such event and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event. Any adjustment made pursuant to clause (i) of this paragraph shall become effective immediately after the record date for the determination of stockholders entitled to receive such dividend or distribution, and any adjustment pursuant to clause (ii) or (iii) of this paragraph shall become effective immediately after the effective date of such subdivision or combination.

(b)   Fundamental Transactions . If at any time during the term of this Warrant the Company proposes to engage in a “Fundamental Transaction” (as hereinafter defined) then, and in any one or more of such cases, the Company will give to the Holder at least ten (10) days’ prior written notice of the date on which the books of the Company will close or a record will be taken for determining rights to vote with respect to such Fundamental Transaction. Such notice will describe the nature of the Fundamental Transaction, the date on which the holders of the Common Shares will be entitled thereto, and such notice will also specify the date on which the holders of the Common Shares will be entitled to exchange the Common Shares for securities or other property deliverable upon the consummation of the Fundamental Transaction. A “ Fundamental Transaction ” is any (i) merger or consolidation of the Company with or into (whether or not the Company is the surviving corporation) another Person, (ii) any sale, assignment, transfer, conveyance or other disposition by the Company of all or substantially all of its assets in one or a series of related transactions; provided , however , that for avoidance of doubt, the granting of a lien on all or substantially all of the Company’s assets as collateral shall not be deemed a Fundamental Transaction hereunder, (iii) purchase, tender or exchange offer by the Company (or to which the Company is a party) that will be for more than 50% of the outstanding shares of Common Stock (not including any shares of Common Stock held by the Person or Persons making or party to, or associated or affiliated with the Persons making or party to, such purchase, tender or exchange offer, (