Dermarest® Psoriasis Medicated Shampoo Plus Conditioner with 3% salicylic acid is specially formulated to relieve symptoms associated with scalp psoriasis. This fragrance-free shampoo plus conditioner relieves itching and prevents the recurrence of scalp irritation, redness, flaking, and scaling caused by psoriasis, seborrheic dermatitis or dundruff. Dermatologist tested. Trust Dermarest for lasting psoriasis symptom relief. Uses: Relieves and helps prevent recurrence of scalp: Itching. Irritation. Redness. Flaking. Scaling due to psoriasis and seborrheic dermatitis.