Browse Through a Wide Assortment Of Amazing Hair Care Products. Amazon Offers an Array Of Unique Products From Hundreds Of Brands. Selsun Suspension relieves itching, flaking, prevents reappearance of dandruff. Selsun Suspension is a topical medicated shampoo that has selenium sulphide (2.5%), which helps to treat and control dandruff through its unique dual-action benefit. Selsun Suspension kills the root cause of dandruff and helps prevent the build-up of skin cells. Selsun is an anti-dandruff shampoo for both men and women and comes with an improved fragrance. How to use: Apply topically to the scalp. After wetting ... Description Selsun Shampoo is a medicated shampoo used to treat dandruff and seborrhoeic dermatitis (a greasy, crusting, itching scalp caused by excess oil). Selsun shampoo has been available for over 90 years. It is a topical medicated anti dandruff shampoo with selenium sulphide (2.5%), which helps treat and control dandruff through its unique dual-action benefit.