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Hidden Risks of Erectile Dysfunction 'Treatments' Sold Online

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Men looking online for "dietary supplements" to treat erectile dysfunction (ED) or enhance their sexual performance should beware: these products may contain prescription drugs or other undisclosed ingredients that can be harmful.

"The number of these problematic products available on the Internet appears to be increasing," says Michael Levy, director of the Food and Drug Administration's (FDA) Division of New Drugs and Labeling Compliance. The division is part of the Office of Compliance (OOC) in the agency's Center for Drug Evaluation and Research (CDER).

Many consumers perceive these products as completely safe because they are often sold with labeling, suggesting that they are all-natural alternatives to prescription drug products that have been approved by FDA for treating ED.

But these products may be laced with potentially hazardous ingredients that aren't noted on the label.

Since 2004, FDA has become aware of several such "dietary supplements" (see sidebar for list).

Viagra Ingredient Found

Working with other FDA components, the division's Internet and Health Fraud Team led an Internet survey in which more than one-third of purchased "dietary supplements" claiming to spur sexual enhancement or treat ED contained undisclosed prescription drug ingredients or similar substances.

Six of the 17 products contained sildenafil (the active ingredient in Viagra) or a substance similar to either sildenafil or vardenafil. Vardenafil is the active ingredient in Levitra, another FDA-approved prescription drug that treats ED.

Mark Hirsch, a medical team Leader in CDER's Division of Reproductive and Urologic Products, says this undisclosed presence of prescription drug ingredients—and similar compounds known as analogs of the drugs—can lead to serious side effects in users.

Dangerous Interactions

"These products may interact in dangerous ways with drugs that a consumer is already taking," Hirsch says. For example, taking sildenafil in addition to certain prescription drugs containing nitrates may lower blood pressure to an unsafe level.

People with diabetes, high blood pressure, high cholesterol, or heart disease are often prescribed drugs containing nitrates, and men with these conditions commonly suffer from ED, Hirsch says. "Those are factors that doctors consider when prescribing approved ED treatments."