Following an analysis of international mailings, the Food and Drug Administration issues a warning to people who may have bought male sexual stimulus Big Penis.
Lab test confirms the active ingredient in prescription drug Viagra, sildenafil, is actually in the Big Penis. The chemical can interact with other nitrates in prescription drugs and "lower blood pressure to dangerous levels," according to the FDA.
"People with diabetes, high blood pressure, high cholesterol or heart disease often take nitrates."  The federal agency suggests that patients who experience side effects from taking an additional supplement add it to their MedWatch Online voluntary reporting form.
The FDA statements inform the public of products labeled as additions, often marked as "completely natural". The agency cannot test every product marketed as such, so they recommend to consumers to use their best judgment before using it.