Sexual Side Effect Warnings Added to Merck & Co., Inc. Drugs

Warning labels for Merck & Co’s drugs for baldness and enlarged prostate will add notices of sexual side effects that continued after use of the medicines was stopped, U.S. health regulators said.

Labels will be revised for Proscar, which treats symptoms of enlarged prostate, and hair-loss treatment Propecia, the Food and Drug Administration said. The active ingredient in both drugs is finasteride.

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