Alternative medicine

By Mayo Clinic Staff

Before using any supplement, check with your doctor to make sure it's safe for you — especially if you have chronic health conditions. Some alternative products that claim to work for erectile dysfunction can be dangerous. The Food and Drug Administration (FDA) has issued warnings about several types of "herbal viagra" because they contain potentially harmful drugs not listed on the label. The dosages might also be unknown, or they might have been contaminated during formulation.

Some of these drugs can interact with prescription drugs and cause dangerously low blood pressure. These products are especially dangerous for men who take nitrates.

May 21, 2015

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