<unk> , also known as<unk>  sulfide, is a chemical compound and medication used to treat pityriasis versicolor, seborrhoeic dermatitis, and dandruff. It is applied to the affected area as a lotion or shampoo. Dandruff frequently returns if treatment is stopped. Side effects include hair loss, irritation of the skin, weakness, and feeling tired. Use is not recommended in children less than 2–5 years old. Use in pregnancy or breastfeeding has not been studied.<unk>  is an inorganic compound with the chemical formula SeS2.<unk>  was approved for medical use in the United States at least as early as 1951. It is on the World Health Organization's List of Essential Medicines.<unk>  is available as a generic medication and over the counter.
Selenium disulfide
Methylphosphonyl difluoride
Selenous acid
Tetraethyllead
Sodium ferric gluconate complex
Hydrogen fluoride
Nickel tetracarbonyl
Tetrachlorodecaoxide