Question: how often should nizoral be used?
Answer: Prescription ketoconazole comes as a cream and a shampoo to apply to the skin. Over-the-counter ketoconazole comes as a shampoo to apply to the scalp. Ketoconazole cream is usually applied once a day for 2 to 6 weeks. Prescription ketoconazole shampoo is usually applied one time to treat the infection.