You need to do an initial wash with shampoo before washing your hair with ketoconazole lotion, and you no longer need to use shampoo again after washing your hair with ketoconazole lotion. 1. Ketoconazole lotion is a broad-spectrum antifungal drug, which has antibacterial and bactericidal effects on dermatophytes, and is mainly used for seborrheic dermatitis, scalp furuncles and other causes of dandruff, itching and so on, due to the sebaceous glands of the scalp secretion leading to increased dandruff, seborrheic dermatitis of the scalp and so on. 2. Before using ketoconazole lotion, the hair will be thoroughly cleaned with shampoo, and then use ketoconazole lotion evenly coated on the scalp gently massaged, rubbed, to promote the absorption of the liquid and play a role in a few minutes after the use of water will be cleaned of the drug ingredients can be, generally can be used twice a week. 3. The use of ketoconazole lotion may occur skin burning sensation, stinging, dryness, etc., allergic to ketoconazole lotion is prohibited. Avoid scratching the head with hands and avoid eating spicy and stimulating food during the treatment period. Ketoconazole lotion hair wash need to be used under the guidance of a doctor, not self-medication, to avoid adverse reactions.