enhancement products sold on the Internet contain the same
ingredients as prescription drugs such as Viagra and are not
only illegal but dangerous, the U.S. Food and Drug
dysfunction products can cause a deadly interaction with
many heart drugs, notably those containing nitrates.
They also can be very dangerous when used in
combination with liquid amyl nitrate or butyl nitrate,
commonly called "poppers," by causing
dangerously low blood-pressure levels.
"The U.S. Food
and Drug Administration is warning consumers not to
purchase or consume Zimaxx, Libidus, Neophase, Nasutra,
Vigor-25, Actra-Rx, or 4EVERON," the agency said in a
threaten the public health because they contain
undeclared chemicals that are similar or identical to the
active ingredients used in several FDA-approved
prescription drug products," explains Steven Galson,
director of the FDA's Center for Drug Evaluation and
Research. "This risk is even more serious because consumers
may not know that these ingredients can interact with
medications and dangerously lower their blood
sildenafil, the active pharmaceutical ingredient in
Viagra, Pfizer's prescription erectile dysfunction product.
products contain chemical ingredients that are similar
either to sildenafil or to vardenafil, the active
ingredient in Levitra. Levitra is a prescription
erectile dysfunction drug developed and sold jointly by
Bayer, GlaxoSmithKline, and Schering-Plough.
diabetes, high blood pressure, high cholesterol, or
heart disease often take nitrates," the FDA said. "ED
[erectile dysfunction] is a common problem in men with
these conditions, and they may seek products like the
ones noted above because these products claim that
they are 'all natural' or that they do not contain the
active ingredients used in FDA-approved ED drugs."
The agency said
it had stopped a shipment of 4EVERON from entry to the
United States and warned the companies selling the drugs.