The Cochrane Skin group published the updated review -Systemic pharmacological treatments for chronic plaque psoriasis-

Psoriasis is an immune-mediated skin disease, which has a major impact on quality of life of the patients affected. The aim of this review was to compare different systemic medicines used to treat psoriasis and to find the safest and most effective way of clearing psoriasis.

Find the full review in the Cochrane Library or read  about it in the Cochrane Clinical Answers