WHAT: An international study showed testosterone, when used with no other hormone therapy, is an effective treatment for low libido in postmenopausal women. More than 800 women from 65 centers in the United States, Canada, Australia, the United Kingdom and Sweden participated in the study, the first to show that testosterone administered by a skin patch can boost sex drive in postmenopausal women.

Previous studies have shown testosterone treatment for low libido is beneficial for women undergoing estrogen therapy. However, this study shows testosterone by itself could be a good alternative for women who do not want to take estrogen.