New York pharmaceutical company Pfizer Inc. (NYSE: PFE) has completed its purchase of specialty pharmaceutical company, NextWave Pharmaceuticals Inc. for as much as $700 million.

NextWave develops and commercializes products, including Quillivant XR, that treat attention deficit hyperactivity disorder.

The price includes a $255 million payment to shareholders, plus $425 in potential additional payments based on sales milestones.

The deal was announced Oct. 22