Split Ruling in Prepopik Exclusivity Case

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The DC federal court has rejected part of a Ferring Pharmaceuticals challenge to FDA over an exclusivity period for its Prepopik fixed-dose combination drug. It also asked both sides for further briefing on another aspect of the challenge. Ferring sought a five-year exclusivity for the drug because one of its three component drug substances, sodium picosulfate, had never previously been approved in a NDA.

The agency initially rejected Ferring’s exclusivity request because two of the three substances had previously been approved for market. The company filed a citizen petition challenging the interpretation and FDA found that the exclusivity provision could reasonably be read to refer to “drug substances” and said it would permit five-year exclusivity for fixed-combination drug products that contained a novel drug substance. However, FDA said it would only apply the new interpretation going forward and thus Ferring still was denied exclusivity.

Ferring sued FDA under the Administrative Procedure Act, claiming that the agency’s initial interpretation was contrary to the plain language of the Federal Food, Drug, and Cosmetic Act or an unreasonable interpretation of statutory ambiguity. The court granted FDA summary judgment on this part of the suit, saying that FDA’s initial interpretation was not unreasonable.

Because both sides provided few legal citations supporting their position on the retroactivity question, the court denied both sides’ motions for summary judgment on that question and called for renewed motions for summary judgment on the retroactivity issue.

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