Selsun Shampoo Dandruff Treatment is a quick, simple and highly effective dandruff treatment. Selsun Shampoo Dandruff Treatment has been formulated to contain Selenium sulphide, which works hard throughout the day to clear up dandruff and seborrhoea dermatitis of the scalp to leave your hair looking ultra shiny and feeling soft and smooth. Directions on how to use Selsun Shampoo Dandruff Treatment: Over 14 years and the elderly: thoroughly wet hair and massage into the scalp to form a lather. Rinse after 2 to 3 minutes. Use twice a week for the first two weeks and then for once a week for the next two weeks to control the condition. After this initial course of treatment, not to be used more ofter than necessary. 5-14 years as above. Under 5 years: not recommended. Selsun Shampoo Dandruff Treatment contains: Selenium sulphide 2.5 %w/v. Size 50ml.