salicylic acid + adapalene + benzoyl peroxide

This is a **topical combination drug** composed of three active ingredients—**salicylic acid**, **adapalene**, and **benzoyl peroxide**—each with distinct mechanisms of action relevant to the treatment of acne vulgaris. - **Salicylic acid** is a beta-hydroxy acid that acts as a keratolytic agent, exfoliating the skin and unclogging pores by increasing the turnover of epidermal cells. - **Adapalene** is a third-generation retinoid that modulates cell differentiation, keratinization, and inflammatory processes of the skin, primarily through agonism of retinoic acid receptors. - **Benzoyl peroxide** is an oxidizing agent with strong antibacterial properties (directly killing Cutibacterium acnes), anti-inflammatory effects, and mild comedolytic (pore-unclogging) actions. Used in combination, these agents synergistically address key acne pathophysiology: reducing follicular hyperkeratinization, suppressing inflammation, and eliminating acne-causing bacteria. This fixed-dose triple agent is typically applied topically and may be found in compounded formulations or as part of certain clinical protocols for moderate to severe acne. No FDA-approved single-brand formulation containing all three exists, but similar triple or dyad combinations are supported in the literature as effective, especially for moderate or resistant acne[1][2].