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Author: Draelos ZD, Carter E, Maloney JM, Elewski B, Poulin Y, Lynde C, Garrett S, United States/Canada Dapsone Gel Study Group
Author affiliation: Dermatology Consulting Services, High Point, North Carolina, USA. zdraelos@northstate.net
Publication date & source: 2007.03, J Am Acad Dermatol., 56(3):439.e1-10. Epub 2007 Jan 17.
Publication type: Clinical Trial, Phase III; Randomized Controlled Trial
BACKGROUND: A new aqueous gel formulation of dapsone has been developed that allows clinically-effective doses of dapsone to be administered topically with minimal systemic absorption. OBJECTIVES: The goal of these studies was to evaluate the efficacy and safety of dapsone gel, 5% in the treatment of acne. METHODS: Patients 12 years of age and older with acne vulgaris (N = 3010) participated in two identically-designed 12-week, randomized, double-blind studies of twice-daily monotherapy with dapsone gel, 5%, versus a vehicle gel. RESULTS: Dapsone gel-treated patients achieved superior results in terms of the investigator's global acne assessment (P < .001) and the mean percentage reduction in inflammatory, noninflammatory, and total lesion counts (all, P < .001) at week 12. Reductions in inflammatory lesion counts favoring dapsone gel over vehicle were apparent as early as 2 weeks and reached statistical significance by 4 weeks. No clinically significant changes in laboratory parameters, including hemoglobin, even among glucose-6-phosphate dehydrogenase-deficient patients, were observed. Adverse events were comparable between the treatment groups and rarely led to discontinuation. LIMITATIONS: Adjunctive topical treatments and their impact on acne were not studied in this trial. CONCLUSIONS: Dapsone gel, 5% appears to be an effective, safe, and well-tolerated treatment for acne vulgaris, with a rapid onset of action.
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