title: A randomized double-blind comparison of the effects on systemic calcium homeostasis of topical calcitriol (3 micrograms/g) and calcipotriol (50 micrograms/g) in the treatment of chronic plaque psoriasis vulgaris.
abstract: Calcitriol and calcipotriol are effective treatments for psoriasis, although the two have never been directly compared. We compared the efficacy and toxicity of each agent in 24 patients with moderately extensive chronic plaque psoriasis, who were randomized in double-blind fashion to apply 90 g per week of either calcitriol (3 micrograms/g) ointment or calcipotriol (50 micrograms/g) ointment over an 8-week period. Mean PASI in patients applying calcitriol fell from 13 to 8.8 (p < 0.05) and in patients applying calcipotriol from 14.9 to 4.7 (p < 0.005). The reduction was significantly greater in the calcipotriol-treated group (p < 0.05). There was a small increase in serum ionized calcium in the calcipotriol-treated group (from 1.21 mmol/L to 1.25 mmol/L, p < 0.05) but no effect on calcium homeostasis in the calcitriol group.
authors.affiliation: Department of Dermatology, Leicester Royal Infirmary, UK.
authors.forename: J F
authors.initials: JF
authors.lastname: Bourke
authors.forename: S J
authors.initials: SJ
authors.lastname: Iqbal
authors.forename: P E
authors.initials: PE
authors.lastname: Hutchinson
mesh_terms: D000328:Adult; D000368:Aged; D002117:Calcitriol / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use*; D002908:Chronic Disease; D003879:Dermatologic Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D006706:Homeostasis / Q000187:drug effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011565:Psoriasis / Q000188:drug therapy*
chemical_list: D003879:Dermatologic Agents; C055085:calcipotriene; D002117:Calcitriol