Selsun Shampoo Dandruff Treatment is a quick, simple & 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 & seborrhoea dermatitis of the scalp to leave your hair looking ultra shiny & feeling soft & smooth. Directions on how to use Selsun Shampoo Dandruff Treatment: Over 14 years & the elderly: thoroughly wet hair & massage into the scalp to form a lather. Rinse after 2 to 3 minutes. Use twice a week for the first two weeks & 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.