FDA Warns About Sexual Enhancement Product

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The sexual enhancement dietary supplement Stiff Nights contains an illegal ingredient that can cause dangerously low blood pressure, the U.S. Food and Drug Administration warned Thursday.

Stiff Nights contains sulfoaildenafil, a chemical similar to sildenafil, the active ingredient in Viagra. The FDA said sulfoaildenafil may interact with prescription drugs known as nitrates, including nitroglycerin, and cause dangerously low blood pressure.

The product, sold in bottles containing 6, 12, or 30 red capsules or in blister packs containing 1 or 2 capsules, is distributed online and at retail stores by Impulsaria LLC of Grand Rapids, Mich.

"Because this product is labeled as an all natural dietary supplement, consumers may assume it is harmless and poses no health risk. In fact, this product is illegally marketed and can cause serious complications," Deborah M. Autor, director of the FDAs Center for Drug Evaluation and Research Office of Compliance, said in an agency news release.

Anyone who has experienced adverse events after using this or any other sexual enhancement product should consult a health professional, the FDA said.