FDA warns consumers not to use Vigor-25

The U.S. FDA says Vigor-25, a product marketed as a natural dietary supplement to enhance male sexual performance, should not be purchased or used .

The U.S. Food and Drug Administration says Vigor-25, a product marketed as a natural dietary supplement to enhance male sexual performance, should not be purchased or used because it contains sildenafil, the active ingredient in the prescription drug Viagra.

Sildenafil may interact with prescription drugs known as nitrates, including nitroglycerin, and can dangerously lower blood pressure. The FDA is investigating the reported death of a 26-year old man, possibly associated with the use of Vigor-25.

Vigor-25, distributed by Piston Corp., is sold on Internet sites and possibly in some retail outlets.

"This product is dangerous to consumers because it claims to contain only natural ingredients when it actually contains a prescription drug ingredient," said Deborah M. Autor, director of the Office of Compliance in the FDA's Center for Drug Evaluation and Research. "Tainted products place consumers at risk of injury and death, especially those consumers with u