Pfizer Inc. (NYSE: PFE) today announced its intention to acquire NextWave Pharmaceuticals, a privately held, specialty pharmaceutical company focused on the development and commercialization of unique products for the treatment of attention deficit/hyperactivity disorder (ADHD) and related central nervous system (CNS) disorders.

NextWave is the developer of Quillivant XR™ (methylphenidate hydrochloride) for extended-release oral suspension, CII, the first once-daily liquid medication approved in the U.S. for the treatment of ADHD, and holds exclusive North American commercialization rights to Quillivant XR. Quillivant XR received approval from the U.S. Food and Drug Administration on September 27, 2012, and is expected to be available in pharmacies in the U.S. in January 2013.

Quillivant XR was developed in collaboration with Tris Pharma, NextWave's technology and manufacturing partner. Quillivant XR is built on Tris' OralXR+ platform.

Pfizer had previously entered into an option and merger agreement with NextWave during the second quarter 2012 and made an option payment of $20 million. Today, Pfizer is exercising its option to acquire NextWave. Under the terms of the agreement, Pfizer will make a payment to of $255 million to NextWave's shareholders at the closing of the transaction, and NextWave's shareholders are eligible to receive additional payments of up to $425 million based on certain sales milestones.