Nizoral Anti-Dandruff Shampoo is a gentle shampoo that is used to treat and prevent dandruff and associated symptoms like dryness, flaking, redness, and itching. This product is fragrance-free and dermatologically tested. It is safe to use on colour-treated hair. Nizoral Anti-Dandruff Shampoo contains the active ingredient Ketoconazole (also known as Nizoral), which prevents male hormones from being taken up by hair follicles. It calms your scalp and improves hair health.