Introduction: Topical clindamycin phosphate 1.2%/adapalene 0.15%/benzoyl peroxide 3.1% (CAB) gel is the first fixed-dose, triple-combination formulation approved for the treatment of acne, and is indicated in patients 12 years of age and older. In 3 clinical studies of participants with moderate-to-severe acne, CAB gel demonstrated superior efficacy to vehicle and component dyads, with good safety/tolerability. To better understand the efficacy and safety of CAB gel in patients with darker skin phototypes, this post hoc analysis included participants who self-identified as ‘Black or African American’ (hereafter referred to as Black). Methods: Data were pooled from a phase 2 (N=741) and two phase 3 (N=183; N=180), double-blind, randomized, 12-week studies. Participants aged ≥9 years with moderate to severe acne were randomized to receive once-daily CAB or vehicle gel. Endpoints included ≥2-grade reduction from baseline in Evaluator’s Global Severity Score and clear/almost clear skin (treatment success) and least-squares mean percent change from baseline in inflammatory/ noninflammatory lesion counts. Treatment-emergent adverse events (TEAEs) were also assessed. Results: Of 657 participants randomized to CAB or vehicle gel, 104 (15.8%) self-identified as Black (n=64 CAB, n=40 vehicle). At week 12, 31.5% of Black participants treated with CAB achieved treatment success, compared to 17.3% with vehicle. Inflammatory lesion reductions with CAB were significantly greater than with vehicle (69.0% vs 53.6%, P&lt;0.01), and noninflammatory lesion reductions were numerically greater with CAB than with vehicle (58.3% vs 51.9%). The rate of TEAEs with CAB treatment in Black participants was generally lower than in the overall study population (23.4% vs 24.6-36.2%), and most TEAEs were of mild-to-moderate severity. Conclusions: Fixed-dose, triple-combination CAB gel was efficacious and well tolerated in Black participants with moderate-to-severe acne. Despite the limited number of self-identified Black participants across the clinical studies of CAB gel, these post hoc analyses add valuable information to the limited literature describing treatment effects of fixed-dose combination acne treatments in Black individuals. Funding: Ortho Dermatologics

Efficacy and Safety of Fixed-Dose Clindamycin Phosphate 1.2%/Adapalene 0.15%/Benzoyl Peroxide 3.1% Gel in Black Participants with Moderate-to-Severe Acne