Wet hair and scalp and apply enough shampoo to cover the scalp and produce a foam (lather). Leave for 3-5 minutes before rinsing. Use twice a week, at least three days apart for the first 2 to 4 weeks. After 2 to 4 weeks you can use the shampoo once every 1 to 2 weeks to keep dandruff under control. Hazards and Cautions For use on the hair and scalp only. Do not use more than the amount recommended above. If symptoms do improve within 4 weeks talk to your pharmacist or doctor If symptoms do not go away within 4 weeks talk to your pharmacist or doctor Nizoral shampoo contains Ketoconazole 20 mg/g which Relieves itchy, flaky scalp caused by dandruff and is dermatologically tested.