OK, right up front, who the hell uses something called “Stiff Nights”? If someone is actually desperate enough to fork over good money for a jar of something called “Stiff Nights”, I can pretty much guarantee they’re not too concerned about their own immediate health and well being.
Having said all that now, the FDA recently issued a warning that “Stiff Nights, a product marketed as a dietary supplement for sexual enhancement, contains an ingredient that can dangerously lower blood pressure and is illegal.”
The gist of it is that… “the FDA determined that the product contains sulfoaildenafil. This is 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.”