Fight dandruff outbreaks with Nizoral A-D Anti-Dandruff Shampoo. This powerful dandruff relief shampoo controls flaking scaling and itching caused by dandruff. It combines the effectiveness of ketoconazole 1% a proven dandruff-fighting ingredient with salon-tested gentleness. Use it just twice a week in between your regular shampoos to control dandruff. This flaky scalp shampoo is gentle enough to use on color-treated chemically processed and gray hair and has a thick rich lather that rinses clean and leaves your hair smelling fresh.