Nizoral Shampoo 100ml Nizarol Shampoo is the perfect solution to fight off dandruff outbreaks, as it treats not only dandruff, but also the associated inflammation, reducing scalp redness & itching. Nizoral kills the fungus that causes dandruff, using the active ingredient ketoconazole, which is used to treat infections with fungi & yeasts. Nizarol Ketoconazole shampoo is used to treat skin conditions that are caused by infection with the yeast Pityrosporum. These include the skin infection pityriasis versicolor, as well as seborrhoeic dermatitis & dandruff, (which is considered to be a mild form of seborrhoeic dermatitis). When used to treat dandruff, Nizarol Shampoo only needs to be used twice a week. It has a thick, rich lather & leaves hair smelling clean & fresh. Nizoral is so gentle that it can be used on color-treated, chemically processed & gray hair.