Selsun 2.5% Selenium Sulfide Extra Strength Lotion - Maximum drug anti-dandruff action, which attacks dandruff. Selsun Blue Shampoo is expressly formulated to combat the dead skin and itchy scalp associated with dandruff and seborrheic dermatitis. It has been shown to be effective in preventing and removing dead skin, and it comes in a variety of forms suitable for all hair types. Selsun Blue tackles dandruff and leaves hair shiny and healthy, making you look your best!