Impax commences IPX159 Phase IIb trial in Restless Legs Syndrome

Impax Pharmaceuticals, the branded products division of Impax Laboratories, Inc. (NASDAQ: IPXL), announced that it has initiated a Phase IIb trial of its drug candidate IPX159 in patients with moderate to severe Restless Legs Syndrome (RLS).

"We are pleased to advance IPX159 to this Phase IIb study, which will help establish its clinical profile in moderate to severe RLS patients. We look forward to reporting the results from this study and providing an update on the program in mid-2013," said Suneel Gupta, Ph.D., chief scientific officer, Impax Pharmaceuticals.

The Phase IIb study is a multicenter, randomized, double-blind, placebo-controlled, safety and efficacy study to evaluate IPX159 in the treatment of moderate to severe RLS. The trial is expected to randomize approximately 120 adult subjects who will receive either IPX159 or placebo and will be treated for up to 11 weeks. The trial will be conducted at multiple sites in North America. The primary endpoint is the International Restless Legs Syndrome Study Group (IRLSSG) Rating Scale.