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ANDA Litigation Discovery

By Paul A. Ragusa and Sandra Lee
May 29, 2008

Patent infringement litigation based on an Abbreviated New Drug Application ('ANDA') presents certain unique challenges to the discovery process. Unlike ordinary patent litigation, little if any information helpful to the patent owner is publicly available. Instead, the patent owner must rely on a well thought out discovery plan to obtain certain information from the ANDA applicant. Suggestions for designing such a plan are presented below.

Background

The Drug Price Competition and Patent Term Restoration Act of 1984, more commonly known as the Hatch-Waxman Act ('the Act'), was established to balance the entry of generics into the marketplace while maintaining research and development incentives for innovator companies. A generic drug manufacturer may challenge the market exclusivity enjoyed by the manufacturer of a patented drug by filing an ANDA. In conjunction with the ANDA, the generic manufacturer is required to file one of four Certifications, namely, a Paragraph I, II, III, or IV Certification. The most common certification is the Paragraph IV Certification, in which the ANDA applicant certifies that the manufacture, use, or sale of the proposed generic drug product (the 'ANDA product') does not infringe the patent covering the drug and/or that the patent is invalid or unenforceable. (Certification under paragraphs I-III generally does not result in litigation as they certify that: (I) no patent information has been filed with the FDA, (II) the patent has expired, or (III) the patent will expire on a date certain.) Once the application and the Certification have been filed, the ANDA applicant is required to give notice of its filing to the New Drug Application ('NDA') holder and the patent owner within 20 days.

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