Supernus Pharmaceuticals, Inc., a specialty pharmaceutical company focused on developing and commercializing products for the treatment CNS, diseases, has sued generic drug makers Actavis Inc., Watson Laboratories, Inc. — Florida, Actavis Pharma, Inc., Watson Laboratories, Inc., and Anda, Inc. (collectively "Watson") for infringement of two patents covering its antiepileptic drug Oxtellar XR. Supernus's United States Patent Nos. 7,722,898 and 7,910,131 cover once-a-day oxcarbazepine formulations and methods of treating seizures using those formulations. Both patents do not expire until April 13, 2027.

The Complaint—filed in the US District Court for the District of New Jersey—alleges that Watson infringed Supernus's Oxtellar XR patents by submitting to the Food and Drug Administration (FDA) an Abbreviated New Drug Application (ANDA) seeking to market a generic version of Oxtellar XR prior to the expiration of Supernus's patents. Filing its Complaint within 45 days of receiving Watson's Paragraph IV certification notice entitles Supernus to an automatic stay preventing the FDA from approving Watson's ANDA for 30 months.

Supernus president and CEO Jack Khattar confirmed that "Supernus intends to vigorously enforce its patent rights."

Supernus is represented by attorneys from Frommer Lawrence and Haug LLP and its corporate counsel, Saul Ewing LLP.