WASHINGTON — The Food and Drug Administration in the past week has posted six more advisories warning consumers about penis pills.
The latest batch of blacklisted sexual-enhancement products include Clalis, MVP Mega, Exten 1300, MaxTreme Zen, Silver Sword and Royal Dragon Herbal Tonic Balls.
The penis pills, marketed as 100 percent herbal, are sold online and at retail shops. FDA laboratory analysis confirmed that each of them contained trace amounts of sildenafil or tadalafil or both. Sildenafil is the active ingredient used in Viagra; tadalafil is the active ingredient in Cialis.
Sildenafil or tadalafil may interact with nitrates found in some prescription drugs such as nitroglycerin and may lower blood pressure to dangerous levels. Men with diabetes, high blood pressure, high cholesterol or heart disease often take nitrates.
Since the beginning of the year, the FDA has given its disapproval to 26 penis pills with spiked ingredients.