Barr Pharma Wins Tentative FDA OK

Barr Pharmaceuticals ( BRL ) said Friday that it has received tentative government approval for its generic version of Allegra-D, the best-selling allergy drug from France's Aventis ( AVS).

The tentative approval reflects the Food and Drug Administration's preliminary determination that a generic product satisfies the substantive requirements for approval, subject to the expiration of legal rights. A tentative approval does not allow the applicant to market the generic drug product.

The company said it believes it was the first applicant to file an ANDA containing a Paragraph IV patent challenge on some of the patents relating to the Allegra-D product. If that is the case and if Barr winds up with final approval, it would enjoy a competitive edge as the first to market.

New Jersey-based Barr said Aventis had filed a lawsuit seeking to prevent final approval of Barr's drug application until after the expiration of various patents, the last of which expires in 2018.

Barr shares ended at $35.10 Thursday.

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