Adapalene

Adapalene

File:Adapalene.svg
Clinical data
Pregnancy category	C
Routes of administration	Topical
ATC code	D10AD03 (WHO)
Legal status
Legal status	UK: POM (Prescription only) US: ℞-only
Pharmacokinetic data
Bioavailability	Very low
Excretion	Biliary
Identifiers
IUPAC name 6-[3-(1-adamantyl)-4-methoxy-phenyl] naphthalene-2-carboxylic acid
CAS Number	106685-40-9
PubChem CID	60164
DrugBank	APRD00780
E number	{{#property:P628}}
ECHA InfoCard	{{#property:P2566}}
Chemical and physical data
Formula	C28H28O3
Molar mass	412.52 g/mol

Adapalene is a topical retinoid primarily used in the treatment of acne and is also used (off-label) to treat keratosis pilaris as well as other skin conditions. It is currently marketed by Galderma under the trade names Differin® in some countries, and Adaferin® in India.

Indications

Adapalene is indicated for the topical treatment of acne vulgaris.

Adapalene has been shown to enhance the efficacity of topical clindamycin. Application of Adapalene gel to the skin 2-5 minutes before application of clindamycin enhances the overall efficacity of the treatment as compared to clindamycin alone

History

Adapalene was approved in 1996 by the U.S. Food and Drug Administration for use in the treatment of acne.

Dosage

Adapalene is applied once daily, after washing and before retiring. In some circumstances, when a patient complains of skin irritation, this may be decreased to once every other day until the irritation ceases.

Available Forms

Differin is available in two forms, 0.1% adapalene and now the newer 0.3% adapalene (as of July 07)

Pharmacology

Pharmacodynamics

Adapalene in small concentrations is a moderator of cellular differentiation, keratinization, and inflammatory processes. The exact mode of action of adapalene is unknown.

Pharmacokinetics

Adapalene is applied topically to the skin, and its absorption into the blood through this medium is very low. Only trace amounts of adapalene have been found in the plasma of chronically treated patients.

External links

• Differin product insert