An individualized treatment regimen is necessary for each patient with psor
iasis because of the diverse nature of the disease. The manifestation of ps
oriasis, the severity and extent of the lesions, and the medical history an
d lifestyle of the patient are important factors that determine the selecti
on of treatment, but in general therapies with the fewest side effects are
preferred. First-line topical treatments are corticosteroids, calcipotriene
, and tazarotene. If topical treatments are unsuccessful, phototherapy with
ultraviolet B or photochemotherapy with psoralens plus ultraviolet A (PUVA
) are the next choices. If psoriasis fails to respond to an adequate trial
of topical therapy or phototherapy, systemic therapies including methotrexa
te, acitretin, or cyclosporin should be initialed. Because the regimens inv
olved in systemic and phototherapy are complex and require frequent dose ad
justments and specialized equipment, the patient should be referred to a de
rmatologist when topical therapy is not effective. Am J Med. 1999;107;595-6
05. (C) 1999 by Excerpta Medica, Inc.