Wash away scalp irritation, itching, scaling and redness with MG217 psoriasis medicated conditioning 3% coal tar shampoo. Formulated with coal tar, this medicated shampoo for dandruff and itchy scalp works by slowing cell growth and controlling build-up. Psoriasis, dandruff and seborrheic dermatitis don't stand a chance against this dry scalp shampoo.