Watson Confirms Exelon(R) Patent Challenge
PARSIPPANY, N.J., Nov. 10, 2011 /PRNewswire/ -- Watson Pharmaceuticals, Inc. (NYSE: WPI) today confirmed that its subsidiary, Watson Laboratories, Inc., filed an Abbreviated New Drug Application (ANDA) with the U.S. Food and Drug Administration (FDA) seeking approval to market rivastigmine transdermal system patches, 4.6 mg/24 hr and 9.5 mg/24 hr. Watson's rivastigmine transdermal system patch is a generic version of Novartis' Exelon(R) Patch. Exelon(R) is a prescription medicine used to treat people with mild to moderate dementia associated with Alzheimer's or Parkinson's disease.
Novartis filed suit against Watson on November 9, 2011 in the United States District Court for the District of Delaware seeking to prevent Watson from commercializing its product prior to the expiration of U.S. Patent Nos. 5,602,176; 6,316,023 and 6,335,031. The lawsuit was filed under the provisions of the Hatch-Waxman Act, resulting in a stay of final FDA approval of Watson's ANDA for up to 30 months from the date that Novartis received notice of Watson's ANDA filing or until final resolution of the matter before the court, whichever occurs sooner, subject to any other exclusivities.
Based on available information, Watson believes it may be a "first applicant" to file an ANDA for the generic version of Exelon(R) Patch and, should its ANDA be approved, may be entitled to 180 days of generic market exclusivity.
For the twelve months ending September 30, 2011, Exelon(R) had total U.S. sales of approximately $424 million according to IMS Health data.About Watson Pharmaceuticals, Inc. Watson Pharmaceuticals, Inc. is a leading integrated global pharmaceutical company. The Company is engaged in the development and distribution of generic pharmaceuticals and specialized branded pharmaceutical products focused on Urology and Women's Health. Watson has operations in many of the world's established and growing international markets.
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