Abstract
Photochemotherapy for psoriasis combining orally administered methoxsalen and long-wave UV (UVA) light was used in 186 patients with severe psoriasis. Several different phototherapy units with various numbers of high-output black lights were used. Excellent (90-100% clear) and good (80-90% clear) results were obtained in 77% of the patients. The average UVA dose at clearing was between 7 and 8 J/cm2. The majority of patients required 1 weekly maintenance UVA dose of their last clearing dose (J/cm2) to remain clear. Side effects and abnormal laboratory findings were minimal.