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U.S. Department of Health and Human Services


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Stiff Nights - product contains undeclared drug ingredient

Audience: Consumers, Pharmacists

[Posted 11/05/2009] FDA notified consumers that Stiff Nights, a product sold as a dietary supplement, contains sulfoaildenafil, a chemical similar to sildenafil, the active ingredient in Viagra. Sulfoaildenafil may interact with prescription drugs known as nitrates, including nitroglycerin, and cause dangerously low blood pressure. The product is distributed on Internet sites and at retail stores by Impulsaria LLC of Grand Rapids, Michigan. It is sold in bottles containing 6, 12, or 30 red capsules or in blister packs containing one or two capsules. 

The FDA advises consumers who have experienced any adverse events from sexual enhancement products to consult a health care professional. Any adverse events that may be related to use should be reported to the FDA's MedWatch Safety Information and Adverse Event Reporting Program online [at www.fda.gov/MedWatch/report.htm], by phone 1-800-332-1088, or by returning the postage-paid FDA form 3500 [which may be downloaded from the MedWatch "Download Forms" page] by mail [to address on the pre-addressed form] or fax [1-800-FDA-0178].

[11/05/2009 - News Release - FDA]
[11/05/2009 - Hidden Risks of Erectile Dysfunction "Treatments" Sold Online - FDA Consumer Updates]