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  • Title: Safety and efficacy of clindamycin phosphate 1.2%-benzoyl peroxide 3% fixed-dose combination gel for the treatment of acne vulgaris: a phase 3, multicenter, randomized, double-blind, active- and vehicle-controlled study.
    Author: Eichenfield LF, Alió Sáenz AB.
    Journal: J Drugs Dermatol; 2011 Dec; 10(12):1382-96. PubMed ID: 22134562.
    Abstract:
    BACKGROUND: Topical fixed-combination therapy containing 1% clindamycin as 1.2% clindamycin phosphate (CLNP) and 3% benzoyl peroxide (BPO) is an effective treatment for acne vulgaris (acne). OBJECTIVES: To demonstrate that the combination of 1.2% CLNP with lower strength BPO (CLNP 1.2%-BPO 3%) in a gel formulation is superior to each individual ingredient, CLNP 1.2% and BPO 3%, and vehicle gel. METHODS: A total of 1,319 patients with acne, aged 12 years or older, were enrolled and randomized (1:1:1:1) to receive CLNP 1.2%-BPO 3%, CLNP 1.2% gel, BPO 3% gel, or vehicle gel once-daily in a 12-week, multicenter, double-blind, parallel-group, vehicle-controlled study. Subjects were evaluated at baseline, weeks 2, 4, 8, and 12 or early termination. Assessment of efficacy was evaluated using a six-point Investigator's Static Global Assessment (ISGA) and Subject's Global Assessment (SGA) of acne severity and lesion counts (inflammatory, non-inflammatory, and total). Safety assessments included skin tolerability and adverse events (AEs). RESULTS: A greater proportion of subjects who used CLNP 1.2%-BPO 3% gel (39%) had a two grade improvement in ISGA from baseline to week 12 compared with CLNP 1.2% (25%; P<0.001), BPO 3% (30%; P=0.016), and vehicle (18%; P<0.001). CLNP 1.2%- BPO 3% was superior to CLNP 1.2% and vehicle alone in the absolute reduction from baseline to week 12 in all three lesion types (P<0.001 all pair-wise comparisons). CLNP 1.2%-BPO 3% was superior to BPO 3% alone in the absolute reduction from baseline to week 12 in inflammatory (P=0.015) and total (P=0.032) lesion counts. The incidence of product-related AEs was low and similar in all study groups (1% with CLNP 1.2%-BPO 3%, 2% with CLNP 1.2%, 2% with BPO 3%, and 2% with vehicle). Local tolerability assessments showed similar minimal changes from baseline to week 12 in all study groups. CONCLUSION: CLNP 1.2%-BPO 3% gel provides superior efficacy to improve ISGA score and reduce inflammatory and total lesion counts compared with the individual active ingredients (CLNP 1.2% and BPO 3%) and vehicle, while maintaining a highly favorable safety and tolerability profile similar to BPO 3% alone.
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