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EPIDUO gel is indicated for the topical treatment of acne vulgaris in patients 12 years of age and older.
EPIDUO (adapalene and benzoyle peroxide) gel, 0.1%/2.5% is a white to very pale yellow, opaque gel for topical use containing adapalene 0.1% and benzoyl peroxide 2.5%.
Adapalene, a synthetic retinoid, is a naphthoic acid derivative with retinoid-like properties. The chemical name for adapalene is (6-[3-(1-adamantyl)-4-methoxyphenyl]-2- naphthoic acid). It has the following structural formula:
Adapalene:

Molecular formula: C28H28O3 Molecular weight: 412.5
Benzoyl Peroxide is a highly lipophilic oxidizing agent that localizes in both bacterial and keratinocyte cell membranes. The chemical name for benzoyl peroxide is dibenzoyl peroxide. It has the following structural formula:
Benzoyl Peroxide:

Molecular formula: C14H10O4 Molecular weight: 242.23
EPIDUO gel contains the following inactive ingredients: acrylamide/sodium acryloyldimethyltaurate copolymer, docusate sodium, edetate disodium, glycerin, isohexadecane, poloxamer 124, polysorbate 80, propylene glycol, purified water, and sorbitan oleate.