GUARANTY CONTINUING UNLIMITED GUARANTY

1.   Guaranty. This Continuing Limited Guaranty (this "Guaranty") is made as of the 17th day of April, 2007 , by _______________ a ________________________ (the "Guarantor"), whose address is 16250 Dallas Parkway, Suite 100, Dallas, Texas 75248, in favor of Presidential HealthCare Credit Corporation ("Payee"). For good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned Guarantor unconditionally guarantees and promises to pay to Payee or order, on demand, in lawful money of the United States, any and all Obligations as hereinafter defined, of Park InfusionCare, LP, a Texas limited partnership, formerly known as Park Infusion Services, LP, Park InfusionCare Of Dallas, LP, A Texas limited partnership, Park InfusionCare Of Houston, LP, a Texas limited partnership, and Park InfusionCare Of San Antonio, LP, a Texas limited partnership (together, jointly and severally, the "Company") to Payee. The word "Obligations" as used herein means and includes any and all debts, obligations and liabilities of Company to Payee, as the same may be modified, renewed or replaced, whether such debts, obligations and liabilities are now, or hereafter made, existing, incurred, or created, due or not due, absolute or contingent, liquidated or unliquidated, or determined or undetermined. This Guaranty is one of payment and not of collection.

2.   Guaranty Continuing; Revocation. This is a continuing Guaranty relating to Obligations, including those arising under successive transactions which shall either continue the Obligations or from time to time renew any of the same. This Guaranty shall remain in effect until the expiration of thirty (30) days after Payee's receipt of written notice of revocation by Guarantor and even then and thereafter, this Guaranty shall be and remain effective as to (a) all Obligations then outstanding; (b) any Obligations incurred or arising subsequent thereto pursuant to any agreements or arrangements between Company and Payee in effect at the time of Payee's receipt of notice of revocation; (c) any renewals or extensions of any of the foregoing; and (d) all expenses and costs of collecting or enforcing any of the foregoing. This Guaranty may not be revoked or terminated except upon strict compliance with the conditions and requirements heretofore set forth in this Section 2. In the event any sums or other things of value that are paid or transferred to or otherwise received by the Payee are rescinded, recovered, required to be returned, set aside, rendered void or otherwise adversely affected in any legal proceeding or for any cause whatsoever, including under any law, rule or regulation relative to bankruptcy, insolvency, fraudulent transfers or other relief of debtors, then this Guaranty shall continue to be effective or shall be revived and reinstated, as necessary in order to give full effect to the Guarantor's liability hereunder, to the same extent as if such payment, transfer and/or receipt had never occurred.

3.   Guarantor's Obligations Independent; Statute of Limitations. The obligations of Guarantor hereunder are independent of the obligations of Company, and a separate action or actions may be brought and prosecuted against Guarantor whether action is brought against Company or whether Company is joined in