what does ketoconazole shampoo do

Ketoconazole shampoo is an antifungal medication that is used to treat fungal or yeast infections of the skin, including dandruff. It works by preventing the growth of fungus and killing the fungus or yeast. Ketoconazole shampoo is also used to treat a skin condition known as pityriasis (tinea versicolor), a fungal infection that causes a lightening or darkening of the skin of the neck, chest, arms, or legs. The shampoo is applied to the affected area and left in place for 5 minutes before rinsing thoroughly with plain water. It may cause side effects such as abnormal hair texture, discoloration, irritation, or pimple-like bumps on the scalp, oiliness or dryness of the hair and scalp, and irritated or red skin. If any of these effects last or get worse, it is important to notify a doctor or pharmacist promptly. People who are allergic to ketoconazole should not use the shampoo.