Selsun Shampoo it a medicated shampoo used to treat dandruff and seborrhoeic dermatitis (a greasy, crusting, itching scalp caused by excess oil). It works against dandruff in two ways: By reducing greasiness of the scalp and. By slowing down growth of the layer of skin cells on the scalp that cause dandruff.
Read the Medication Guide before you start using medicines and each time you get a refill. If you have any questions, ask your doctor or your pharmacist.