The Food and Drug Administration (FDA) is advising consumers to not buy or use Arize and Herbal Vigor Quick Fix, products marketed for sexual enhancement.

Laboratory analysis confirmed that Arize capsules contained sulfoaildenafil, an ingredient structurally similar to sildenafil (Viagra; Pfizer). Viagra is an approved prescription drug indicated for erectile dysfunction. The undeclared sulfoaildenafil may lower blood pressure to dangerous levels when it interacts with nitrates found in some prescription drugs.

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Herbal Vigor Quick Fix capsules were found to contain tadalafil, the active ingredient in Cialis (Eli Lilly), another FDA-approved medication for erectile dysfunction. Tadalafil may also interact with drugs like nitroglycerin and may lower blood pressure.

Consumers are to stop using the product immediately and discard it. Both products are sold on various websites, including, and in some retail stores.

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