If you feel like you've tried everything to get rid of your stubborn dandruff, try Nizoral® A-D Anti-Dandruff shampoo. Nizoral® works differently than other dandruff treatments - it's the only over-the-counter dandruff shampoo with the active ingredient Ketoconazole. Nizoral® doesn't just address your symptoms, it gets to the root cause of dandruff by killing the fungus that causes it. In fact, in laboratory testing Ketoconazole was shown to be 10X more effective at fighting fungus than the active ingredient in the leading dandruff shampoo brand*. Nizoral® starts working from the first use and is clinically proven to relieve itching, flaking and scaling from dandruff. Unlike some other dandruff shampoos, Nizoral® A-D has a clean, fresh scent. It's a powerful dandruff fighter that's gentle enough to use on color-treated, chemically processed, and gray hair.