Supposedly Ketoconazole (Nizoral) has some mysterious not-proven anti-androgenic affect on the skin, thus people use it to combat hair loss and acne that's androgen related.

In reality I wouldn't bother using Nizoral for either. If it has any provable anti-androgen effect whatsoever on hairloss or acne they would be marketing the shit out of that stuff. Balding middle aged men would be rushing the stores to buy it.