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A supplement called "Stiff Days" contains sildenafil, the active ingredient in prescription drug Viagra, which is used to treat erectile dysfunction
; "Rock-It
Man" contains a similar compound called hydroxythiohomosildenafil; and
"Libido Sexual Enhancer" contains both of those ingredients as well as
tadalafil, which is the active ingredient in the prescription drug
Cialis, according to the FDA.
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The products are sold online and in some retail stores.
There is a growing trend in dietary supplements
, often
promoted for sexual enhancement, weight loss, and body building, to
contain with hidden drugs and chemicals, although they are often
represented as being "all natural," the agency said.
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Consumers
should be careful about purchasing such products, the FDA said, because
the agency is unable to test and identify all products on the market
that are marketed as dietary supplements but have potentially harmful
hidden ingredients.