Vitamin D and topical therapy.

A sequential therapy regimen involving an initial clearing phase of daily applications of calcipotriene 0.005% ointment and halobetasol 0.05% ointment for 2 weeks, followed by halobetasol applied twice daily on weekends and calcipotriene applied twice daily on weekdays, has been shown to be effective in the management of chronic plaque psoriasis. As a clearing regimen, the combined use of halobetasol and calcipotriene for 2 weeks was superior to monotherapy with either agent. Subsequently, the use of halobetasol on weekends and calcipotriene on weekdays allowed 76% of patients to stay in remission for up to 6 months, compared with 40% of patients who applied halobetasol on weekends only and placebo on weekdays. Calcipotriene can be inactivated when mixed with some topical preparations; however, halobetasol propionate 0.05% ointment and cream have been shown to be compatible with calcipotriene for up to 2 weeks. The compatibility of calcipotriene and halobetasol permits the use of these agents together.