Nizoral Anti-Dandruff Shampoo with Ketoconazole 1% is a clinically proven medicated shampoo that controls flaking, scaling, and itching associated with dandruff. At 19 fl oz (562mL), this Costco-exclusive size offers exceptional value over standard retail sizes.

Ketoconazole is the only over-the-counter anti-dandruff active ingredient that works as an antifungal, targeting and controlling the fungus on the scalp that is often associated with dandruff. Unlike many shampoos that simply wash away flakes temporarily, Nizoral addresses the root cause, providing longer-lasting relief with use just twice a week. The formula leaves hair clean with a fresh scent.

For adults and children 12 years and over: wet hair thoroughly, apply shampoo, generously lather, rinse thoroughly, and repeat. Use every 3–4 days for up to 8 weeks or as directed by a doctor, then use only as needed to control dandruff. For external use only. Avoid contact with eyes; if product gets into eyes, rinse thoroughly with water. Do not use on scalp that is broken or inflamed, or if you are allergic to any ingredients in this product. Stop use and ask a doctor if rash appears or condition worsens or does not improve in 2–4 weeks. If pregnant or breast-feeding, ask a doctor before use. Keep out of reach of children. Store at 20°C to 25°C (68°F–77°F).

Active ingredient: Ketoconazole 1% w/w. Inactive ingredients: benzyl alcohol, BHT, blue 1, citric acid, cocamide MEA, fragrance, glycol distearate, hydrochloric acid, hydroxypropyl methylcellulose, polyquaternium-7, sodium benzoate, sodium chloride, sodium cocoyl sarcosinate, sodium hydroxide, sodium laureth sulfate, tetrasodium EDTA, water.