Three dietary supplements advertised as "all-natural" alternatives to approved erectile-dysfunction (ED) medications have been recalled by the US FDA. True Man Sexual Energy Nutrient Capsules, Energy Max Supplement Men's Formula Capsules, and Encore Tabs are illegal products containing the same active  ingredient as prescription medications and could interact with other medicines to lower low blood pressure to a dangerous level.

True Man and Energy Max have been found to contain the equivalent of Viagra; True Man contains the equivalent of Levitra and Encore Tabs have been found to contain the equivalent of Cialis.

These undeclared ingredients may interact with prescription medicines such as nitroglycerin, often taken by men with diabetes, high blood pressure, high cholesterol levels and coronary heart disease. "The risk is even more serious because consumers may not know that these ingredients can interact with medications and dangerously lower their blood pressure," says the FDA's Center for Drug Evaluation and Research. Customers who have obtained these  products should immediately stop using them and contact their healthcare provider if they have any concerns.