The scalp is susceptible to a variety of skin conditions, such as dandruff and seborrheic skin conditions. The Nizoral is an antifungal shampoo which effectively treats dandruff and other scalp conditions such as yeast growth and fungi.Apply this Shampoo directly to the scalp. Use the Nizoral shampoo twice weekly and massage it into your scalp for 3 to 5 minutes. Rinse thoroughly.