Yes, the shampoo you mentioned is highly effective for dandruff. It combines an antifungal ingredient (ketoconazole) with an exfoliating agent (salicylic acid). Dandruff is typically triggered by a common scalp yeast; ketoconazole targets this yeast directly, while salicylic acid helps loosen and clear away the stubborn flakes. To get the best results, wet your hair, massage the shampoo gently into your scalp, and leave it on for 3 to 5 minutes before rinsing it out completely. Using it twice a week is usually sufficient. It is very safe, but if you notice any mild irritation, reduce usage and consult your doctor.