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Pfizer generic on hold until 2019

A US district court has ruled against Teva Pharmaceuticals marketing a generic version of Viagra until its Pfizer patent expires in October 2019
A US district court has ruled against Teva Pharmaceuticals marketing a generic version of Viagra until its Pfizer patent expires in October 2019.

Israel-based Teva had claimed Pfizer's patent on Viagra (sildenafil) wasn't valid and couldn't be enforced. It also claimed that Pfizer intentionally withheld documents from the US Patent and Trademark Office.

But US Judge Rebecca Smith, Virginia said that Teva had presented no clear and convincing evidence to support this, in a 110-page opinion.

The decision was made at the end of a two-week non-jury trial. It protects Pfizer's $1bn a year in US Viagra sales.

Pfizer has noted that the decision is subject to appeal. Litigation on the same patent against other companies remains pending.

16th August 2011

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