FDA Issues New Warnings About Testosterone Drugs

The new rules now require additional warnings of a possible increased risk of heart attack and stroke.
2:18 | 03/04/15

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Transcript for FDA Issues New Warnings About Testosterone Drugs
Back now at 7:43 with a new warning from many who use low testosterone drug, prescriptions have nearly doubled in the last five years but now the fda says the popular drugs are being overused and may not be safe. ABC's Neal Karlinsky has the details. With less energy, moodiness and a low sex drive -- Reporter: You've seen the ads. Over 0% had their T levels -- Reporter: The "T" in low T stands for testosterone said to re reinvigorate everything from a man's energy to his muscles fueled by 2 million men like Chris running hoping to look a little less middle age and a little more magic Mike. ? I get out of the shower and look in the mirror, I'm impressed because I look afrik awesome. Reporter: They're being handed out too often and include drugmakers to include additional warnings that this he may increase the risk of heart attack and stroke. I went from being in extremely strong shape, olympic type shape to slowly deteriorating to the point where I was completely and totally paralyzed below my chest. Reporter: Bob cripe says he suffered a spinal stroke after taking AndroGel and is suing. The drug's manufacturer telling ABC news it is not discussing ongoing litigation. If I would have known of the side effects of this drug that included strokes or heart attacks or any other type of complications such as that, I would have never taken it. Reporter: The fda also says drugmakers need to make clear that low T treatment should only be for men with certain medical conditions and isn't approved to combat Normal aging. The vast majority of men taking testosterone don't have a condition for which it's indicated and the fda is very worried about that. Reporter: Two low T manufacturers spoke with ABC news, one telling us, "We've heard from the fda and we'll continue to work closely with the agency in the best interests of men who use testosterone therapy" and the other saying "It is committed to our patients and we continue to work with the fda." For "Good morning America," Neal Karlinsky, ABC news, Seattle.

This transcript has been automatically generated and may not be 100% accurate.

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