Tonix rises as first new fibromyalgia drug in 15 years becomes available in U.S.

Shares of drugmaker Tonix Pharmaceuticals TNXP.O rise 16.2% to $18.43 premarket

Co says its new drug Tonmya, the first treatment for fibromyalgia approved in more than 15 years, is now available by prescription at pharmacies across the U.S.

Fibromyalgia is a chronic disorder causing widespread pain and fatigue

Co's Tonmya, taken once daily at bedtime, is designed to relieve chronic pain that affects an estimated 10 million Americans, most of whom are women - TNXP

Approval followed two late-stage trials showing significant pain reduction vs placebo at 14 weeks, co says

Up to last close, stock down ~52% YTD