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The objective of this study was to assess the safety and efficacy of the fixed combination calcipotriene 0.005% plus betamethasone dipropionate 0.064% topical suspension in adolescents with extensive scalp psoriasis. In this phase II, open-label, 8-week study, adolescents with psoriasis (ages 12–17 years) with 20% or more of the scalp area affected (at least moderate severity according to Investigator's Global Assessment [IGA]) were assigned to once-daily treatment with calcipotriene plus betamethasone dipropionate topical suspension. The primary endpoint was safety, focusing on calcium metabolism and hypothalamic–pituitary–adrenal axis function. Secondary efficacy endpoints were the proportion of patient's achieving treatment success (clear or almost clear disease according to the IGA and clear or very mild disease according to the Patient's Global Assessment [PaGA]) and percentage change in investigator-assessed Total Sign Score (TSS). Pruritus was also assessed. Overall, 31 patients received treatment. Sixteen patients (52%) experienced a total of 20 adverse events; 19 were considered unrelated to study treatment, 14 were mild, and none were serious or lesional or perilesional on the scalp. One patient showed signs of mild adrenal suppression at week 4; the patient discontinued treatment and had normal test results at follow-up 4 weeks later. No cases of hypercalcemia were reported. By treatment end, treatment success was reported for 17 patients (55%) according to the IGA and 18 (58%) according to the PGA. Mean TSS improved from 6.9 at baseline to 2.9 at treatment end (59% improvement). By week 8, 28 patients (90%) experienced mild or no itching, versus 20 (65%) at baseline. Once-daily calcipotriene plus betamethasone dipropionate topical suspension was well tolerated and efficacious for the treatment of scalp psoriasis in adolescents.

The two-compound scalp formulation was superior to calcipotriol scalp solution in improving QoL in patients with scalp psoriasis.