ROCKVILLE, MD -- (MARKET WIRE) -- 02/21/2006 -- Supernus Pharmaceuticals, Inc., announces the closing of a second round of financing, raising an additional $17.5 million. This completes the Series A funding for a total of $45 million in venture capital. The company announced last month the closing of the first round of financing and the acquisition of substantially all the assets comprising the product formulation and development business of Shire Laboratories Inc., a subsidiary of Shire plc.