September 9, 2012
Eli Lilly & Co. photo

This photo provided by Eli Lilly & Co. shows the drug Axiron. Axiron, an underarm gel that rolls on like deodorant, is one drug used by men struggling with symptoms of growing older associated with low testosterone such as poor sex drive, weight gain and fatigue. It’s one of a growing number of prescription gels, patches and injections aimed at boosting levels of the male hormone that begins to decline in men after about age 40. Drugmakers and some doctors claim testosterone therapy can reverse signs of aging _ even though the safety and effectiveness of such treatments is unclear.