Apart from that, topical medications like emollients, creams containing coal tar, dithranol (anthralin), corticosteroids like desoximetasone (Topicort), fluocinonide, vitamin D3 analogues (for example,
calcipotriol), and retinoids have been routinely used. Phototherapy containing UV A has also been employed. But it is usually seen that psoriasis can become resistant to a specific therapy. Treatments may be periodically changed to prevent resistance developing.