Women with androgenic alopecia may consider trying prescription ketoconazole at a strength of 2 percent. This drug comes in the form of a shampoo and also goes by the name Nizoral. It’s an antifungal agent and may help reduce the body’s production of testosterone and other androgens that lead to hair loss. You can also find 1 percent strength at your local pharmacy, but it may not be as effective.
Many other women, though, start noticing thinning hair on top of their heads. Doctors say the defining sign is a widening of the part. The hairline itself is usually intact, but the hair becomes less dense behind it. Doctors will often run a battery of tests to make sure there are no treatable medical conditions, such as anemia, thyroid problems, tumors, or hormonal problems. "Ninety percent of the time, it's normal," Patel said.