Novale Scalp Lotion (ketoconazole) is a medicated antifungal lotion and not a shampoo, so it is not meant to be washed off immediately after application. It is used topically on the scalp and skin to treat fungal and yeast-related infections such as dandruff, seborrhoeic dermatitis, jock itch, and ringworm. It works by reducing the growth of fungi and relieving itching, flaking, and irritation. You should always use it exactly as prescribed by your doctor to ensure safe and effective treatment.