FDA panel rejects VVUS' Qnexa, citing safety worries

http://blogs.wsj.com/health/2010/07/15/fda-panel-rejects-vivuss-qnexa-citing-safety-worries/?mod=yahoo_hs

Vivus’s Qnexa, the first of three new anti-obesity drugs under FDA review this year, came before one of the agency’s advisory committees today — and it was a swing and a miss. The panel recommended against approval, with 10 panel members voting against it and 6 in favor, as the WSJ reports.

Trading in the company’s shares was halted at $12.38. But shares in Arena, which makes one of the other experimental drugs, lorcaserin, were up more than 9% in after hours trading, to $4.30. Shares in Orexigen, which makes the other drug, Contrave, fell 10% in after-hours trading, to $4.50. Contrave is similar to Qnexa in that it, too, is a combination of existing drugs.

The problem wasn’t Qnexa’s effectiveness. But panel members said that safety concerns, such as birth defects, depression, and a high heart rate experienced by some study participants, were worrisome in light of the fact that the drug might be taken by millions of otherwise healthy people over many years. They wanted longer-term data than the company had available in order to assuage safety concerns.