Selsun Shampoo is an anti-dandruff shampoo contains Selenium sulfide 2.5%.Selsun Shampoo is a medicated shampoo used to treat dandruff and seborrhoeic dermatitis (a greasy, crusting, itching scalp caused by excess oil). Selsun Shampoo works against dandruff by reducing greasiness of the scalp andby slowing down growth of the layer of skin cells on the scalp that cause dandruff.Direction of use Selsun Shampoo for adults, (including elderly) and children over 5 years old:1. Shake bottle well before use2. Wet the hair and then massage enough into your scalp to form a lather3. Leave for two to three minutes4. Rinse thoroughly Selsun should be used twice a week for the first two weeks and then once a week for the next two weeks. Use under Medical Supervision