EXHIBIT 4.3 EP ENDO PHARMACEUTICALS HOLDINGS INC. INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE SEE REVERSE FOR COMMON STOCK CERTAIN DEFINITIONS CUSIP 29264F 20 5 THIS IS TO CERTIFY that [CERTIFICATE OF STOCK] is the owner of fully-paid and non-assessable shares of Common Stock of the par value of $.01 each of __________________ ____________________ ______________________ENDO PHARMACEUTICALS HOLDINGS INC.________________________ ___________________ ____________________ transferable only on the books of the Corporation by the holder hereof in person or by duly authorized attorney upon surrender of this Certificate properly endorsed. This Certificate is not valid unless countersigned and registered by the Transfer Agent and Registrar. IN WITNESS WHEREOF, the said Corporation has caused this certificate to be executed by the facsimile signatures of its duly authorized officers and has caused a facsimile of its corporate seal to be hereunto affixed. Dated: SEAL /s/ Jeffrey R. Black /s/ Carol A. Ammon TREASURER PRESIDENT COUNTERSIGNED AND REGISTERED: AMERICAN STOCK TRANSFER & TRUST COMPANY TRANSFER AGENT (NEW YORK, N.Y.) AND REGISTRAR BY AUTHORIZED SIGNATURE The Company will furnish without charge to any shareholder who so requests a full statement of, and the authority of the Board of Directors to fix, the designation, relative rights, preferences and limitations of the shares of each class of stock, or series thereof, authorized to be issued. The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations. TEN COM -as tenants in common UNIF GIFT MIN ACT-___________Custodian__________ TEN ENT -as tenants by the entireties (Cust) (Minor) JT TEN -as joint tenants with right of under Uniform Gifts to Minors survivorship and not as tenants Act_________________________ in common (State) Additional abbreviations may also be used though not in the above list. For Value Received, ____________ hereby sell(s), assign(s) and transfer(s) unto PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE - - --------------------------------------- - - --------------------------------------- - - -------------------------------------------------------------------------------- (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE) - - -------------------------------------------------------------------------------- - - -------------------------------------------------------------------------------- - - ----------------------------------------------------------------------- Shares of the capital stock represented by the within Certificate, and do hereby irrevocably constitute and appoint - - ----------------------------------------------------------------------- Attorney to transfer the said stock on the books of the within named Corporation with full power of substitution in the premises. Dated ___________________________ _____________________________________________________ NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATSOEVER Signature(s) Guaranteed: __________________________________________________ THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCK-BROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17AG-15. KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN, MUTILATED OR DESTROYED, THE CORPORATION WILL REQUIRE A BOND OF INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT CERTIFICATE.