Sanofi-aventis and Bristol-Myers Squibb Company have reached an agreement subject to certain conditions with Apotex Inc. and Apotex Corp. to settle the patent infringement lawsuit pending between the parties in the US District Court for the Southern District of New York.

The lawsuit relates to the validity of a composition of matter patent for clopidogrel bisulfate (the '265 patent), a medicine made available in the United States by sanofi-aventis and Bristol-Myers Squibb as Plavix. The trial in the lawsuit had previously been scheduled to begin in June 2006. As a result of the agreement, the Court has now suspended the trial date pending the possible finalization of the proposed settlement.

Plavix is claimed to be the only antiplatelet medication approved by the US Food and Drug Administration to reduce the risk of heart attack, stroke, or vascular death in patients with established peripheral arterial disease (PAD).

Under the terms of the proposed settlement, sanofi-aventis would grant Apotex a royalty-bearing license under the '265 patent to manufacture and sell its FDA-approved clopidogrel bisulfate product in the United States, and Apotex would agree not to sell a clopidogrel product in the United States until the effective date of the license. The license would be exclusive (except for the Plavix brand product) and would be effective on September 17, 2011, with the possibility of an effective date earlier in 2011 if sanofi-aventis does not receive an extension of exclusivity for paediatric use under the '265 patent. If a third party obtains a final decision that the '265 patent is invalid or unenforceable, under certain circumstances, the license to Apotex may become effective earlier.

As previously disclosed, sanofi-aventis and Bristol-Myers Squibb have filed a patent infringement claim against Dr. Reddy's Laboratories with respect to the '265 patent. Sanofi-aventis and Bristol-Myers Squibb have approached Dr. Reddy's to discuss a possible settlement of this matter. The outcome of these discussions cannot be assured.

The agreement includes other provisions, including payments by sanofi-aventis and Bristol-Myers Squibb to Apotex in the event of either finalization of the proposed settlement or termination of the agreement. Payments due to Apotex under the agreement are payable 50% by sanofi-aventis and 50% by Bristol-Myers Squibb.

Apotex announced in January 2006 that it had received final approval of its ANDA for clopidogrel bisulfate from the FDA. As a result, if the litigation were reinstated, Apotex could launch a generic clopidogrel product at risk.