Ketoconazole Hair Shampoo is usually applied to the hair or the area to be washed by wetting it with water, then applying a small amount of Ketoconazole Shampoo to the scalp area or the hair area to be washed, rubbing it gently for 1 to 3 minutes, and then rinsing it off with water. This shampoo is generally indicated for scalp psoriasis, or seborrheic dermatitis of the scalp, and can also be applied to fungal infections of the scalp. So this hair shampoo, in general, has a wide range of indications. However, while using it, try not to use alkaline bath products.