Adapalene (Differin) is a polyaromatic retinoidlike compound that binds to specific retinoic acid nuclear receptors and is thought to normalize the differentiation of keratinocytes in the sebaceous acroinfundibulum. Adapelene is indicated for topical treatment of acne. Minor local irritation is a common, usually tolerable side effect. In contrast to other drugs of the retinoid group, adapalene has not been shown to be teratogenic in rodents. However, since adequate human studies are lacking, its use in pregnant women should be discouraged until further information is available.
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