Antifungal shampoos and creams for seborrheic dermatitis (Cochrane, 2015)

This review pooled 51 trials with 9,052 people to test antifungal treatments applied to the skin. People using ketoconazole were about 31% less likely to still have symptoms at four weeks than those using a dummy treatment, and ketoconazole worked as well as steroids but caused fewer side effects. Ciclopirox also beat placebo. Most studies were short (four weeks or less), so long-term evidence is limited.