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BACKGROUND: A fixed-dose combination gel with adapalene 0.1% and benzoyl peroxide (BPO) 2.5% has been developed for the once-daily treatment of acne. OBJECTIVE: To evaluate the efficacy and safety of adapalene 0.1% -BPO 2.5% fixed combination gel (adapalene-BPO) for the treatment of acne. METHODS: A total of 517 subjects were randomized in a double-blind controlled trial to receive either adapalene-BPO, adapalene, BPO, or vehicle for 12 weeks (2:2:2:1 randomization). Evaluation included success rate (subjects "clear" or "almost clear"), lesion count, cutaneous tolerability, and adverse events. RESULTS: The fixed-dose combination gel of adapalene and BPO was significantly more effective than corresponding monotherapies, with significant differences in total lesion counts observed as early as 1 week. Adverse event frequency and cutaneous tolerability profile for adapalene-BPO were similar to adapalene monotherapy. LIMITATIONS: These data were generated in a controlled trial. Results obtained in clinical practice could differ. CONCLUSIONS: The fixed-dose combination of adapalene and BPO provides significantly greater efficacy for the treatment of acne vulgaris as early as week 1 relative to monotherapies, with a comparable safety profile to adapalene.
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