Supernus Announces Paragraph IV ANDA Filing for Oxtellar XR

Supernus Pharmaceuticals, Inc.

today announced that on December 9, 2014 the Company received a Paragraph IV Notice Letter from TWi Pharmaceuticals, Inc. ("TWi") advising Supernus of the filing by TWi of an Abbreviated New Drug Application seeking approval for oxcarbazepine extended-release tablets. Supernus is currently reviewing the details of this Notice Letter and intends to vigorously enforce its intellectual property rights relating to Oxtellar XR. The product is currently protected by four issued patents that expire no earlier than 2027.