Last week the U.S. Food and Drug Administration said it has begun investigating the risk of stroke, heart attack and death in men taking prescription testosterone drugs.
The announcement came on the heels of two recent two studies that suggested an increased risk of heart attacks in men who take testosterone, a hormone produced in the testicles that is responsible for maintaining muscle bulk, bone growth and sexual function, the FDA said. The FDA said it has not concluded that testosterone increases the risk of cardiac events but said it is issuing an alert "while we continue to evaluate the information from these studies and other available data."