Abstract

Background: The biologically active form of vitamin D 3, calcitriol, is effective in the treatment of psoriasis but can alter calcium metabolism. Calcipotriene is an analog of calcitriol that has low calcemic activity and aids in clearing psoriasis. Objective: The purpose of this study was to determine the safety of topical therapy with calcipotriene particularly in relation to calcium and bone metabolism. Methods: In a double-blind, randomized, parallel, vehicle-controlled trial, 78 adults with plaque psoriasis were treated twice daily with topical calcipotriene ointment (50 μg/gm, maximum usage, 120 gm per week) or vehicle for 8 weeks. After a screening visit, patients were admitted to the hospital at weeks 0 (baseline), 1, 2, 4, and 8. Blood and urine chemistry analysis included parathyroid hormone, serum calcium, bone-specific alkaline phosphatase, urinary hydroxyproline, and 24 hour urinary calcium excretion. Bone densitometry measures were performed at baseline and week 8. Results: No incidences of calcipotriene treatment-related hypercalcemia, calcium mobilization from bone, or clinically significant changes in bone density were noted during this study. Conclusion: Topical application of up to 120 gm per week of calcipotriene ointment for 8 weeks is safe and effective for plaque psoriasis. There were no adverse effects on calcium and bone metabolism during this 8-week study.

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