Hyperpigmentation due to topical calcipotriol and photochemotherapy in two psoriatic patients.

The vitamin D3 analogue calcipotriol (calcipotriene) is an effective topical treatment for psoriasis. In combination with other antipsoriatic agents, such as ultraviolet radiation, calcipotriol is reported to improve the overall efficacy of the treatment. Here we describe two patients treated with a combination treatment of calcipotriol and bath psoralens and ultraviolet A who developed hyperpigmentation at the lesional sites where calcipotriol ointment was applied.