Control Scalp build-up and dandruff with MG217 Dandruff 3% Coal Tar Dandruff Shampoo. Formulated with 3% Coal Tar, this medicated dandruff shampoo for dry scalp provides temporary relief from itching, flaking, and scalp irritation. Psoriasis, dandruff, and seborrheic dermatitis don't stand a chance against this medicated dandruff shampoo for scalp problems. This shampoo soothes, repairs, and protects you hair and scalp. Coal Tar is a doctor recommended active ingredient for the control of dandruff and helps prevent recurrence. Shake well before using. Wet hair then massage liberal amount of MG217 Dandruff into the scalp and leave on for several minutes. Rinse thoroughly. For best results, use at least twice a week or as directed by a physician.