Combination phototherapy of psoriasis with calcipotriene and narrow-band (311 nm) UVB

Trends in on and off-label calcipotriene use

Following its introduction in 1994, calcipotriene quickly became the single most prescribed medication for psoriasis according to National Ambulatory Medical Care Survey (NAMCS) data. Primarily through regulation of cellular differentiation, calcipotriene may be effective in dermatoses other than psoriasis. We characterize the clinical trends in the utilization of calcipotriene by analyzing a representative sample of visits to US physicians. Demographic characteristics, specialty of the provider, and off-label uses are reported. Calcipotriene was mentioned at 5.8 million of all NAMCS visits during the study period. Nearly 57% of mentions of calcipotriene were not linked to a diagnosis of psoriasis. Adjusted use for gender and race were relatively stable; there was a rise in non-psoriasis uses and use among non-dermatologists in 1997. Our findings support previous reports of the utility of calcipotriene in treating other dermatoses as witnessed by the numerous conditions for which its use was observed. Physicians and policy-makers should be aware of the role that this medication plays in the delivery of dermatologic care.

Systematic review of comparative efficacy and tolerability of calcipotriol in treating chronic plaque psoriasis

OBJECTIVES

To evaluate the comparative efficacy and tolerability of topical calcipotriol in the treatment of mild to moderate chronic plaque psoriasis.

DESIGN

Quantitative systematic review of randomised controlled trials.

SUBJECTS

6038 patients with plaque psoriasis reported in 37 trials.

MAIN OUTCOME MEASURES

Mean difference in percentage change in scores on psoriasis area and severity index, and response rate ratios for both patients' and investigators' overall assessments of marked improvement or better. Adverse effects were estimated with the rate ratio, rate difference, and number needed to treat.

RESULTS

Calcipotriol was at least as effective as potent topical corticosteroids, calcitriol, short contact dithranol, tacalcitol, coal tar, and combined coal tar 5%, allantoin 2%, and hydrocortisone 0.5%. Calcipotriol caused significantly more skin irritation than potent topical corticosteroids (number needed to treat to harm for irritation 10, 95% confidence interval 6 to 34). Calcipotriol monotherapy also caused more irritation than calcipotriol combined with a potent topical corticosteroid (6, 4 to 8). However, the number needed to treat for dithranol to produce lesional or perilesional irritation was 4 (3 to 5). On average, treating 23 patients with short contact dithranol led to one more patient dropping out of treatment owing to adverse effects than if they were treated with calcipotriol.

CONCLUSIONS

Calcipotriol is an effective treatment for mild to moderate chronic plaque psoriasis, more so than calcitriol, tacalcitol, coal tar, and short contact dithranol. Only potent topical corticosteroids seem to have comparable efficacy at eight weeks. Although calcipotriol caused more skin irritation than topical corticosteroids this has to be balanced against the potential long term effects of corticosteroids. Skin irritation rarely led to withdrawal of calcipotriol treatment. Longer term comparative trials of calcipotriol versus dithranol and topical corticosteroids are needed to see whether these short term benefits are mirrored by long term outcomes such as duration of remission and improvement in quality of life.