Adapalene
Adapalene is a third-generation topical retinoid primarily used in the treatment of mild-moderate acne , and is also used off-label to treat keratosis pilaris as well as other skin conditions . 
<triplet> Adapalene <subj> retinoid <obj> subclass of <subj> acne <obj> medical condition treated <triplet> acne <subj> Adapalene <obj> drug used for treatment