adapalene
Adapalene is a topical retinoid applied to the skin to treat acne. It normalises how skin cells grow and shed inside the follicle, keeps pores from clogging, and calms local inflammation. It is available in gels and creams and is used in adults and adolescents.
This page is based on FDA labeling and DailyMed for adapalene, cross-checked with MedlinePlus and the National Cancer Institute dictionary; the mechanism is explained in plain language, and analogies are used only where they stay accurate.
How it works
Explains what the medicine does in the body, not dosing, side effects, or safety.
An analogy
A pimple starts when a skin pore gets plugged with sticky, slowly shedding cells, like a drain blocked by hair. Adapalene tells the lining cells of the pore to mature and shed on schedule, keeping the drain open so oil can flow out instead of backing up and feeding acne bacteria.
In simple terms
Acne forms when hair follicles become blocked by dead skin cells and excess oil. Adapalene is a retinoid-like compound that binds retinoic acid receptors in skin cells and changes which genes are active. This helps follicle cells shed normally, prevents new micro-clogs from forming, and reduces the redness and swelling of existing spots.
In depth
Adapalene is a naphthoic acid derivative that selectively binds RAR-beta and RAR-gamma nuclear receptors in epidermal cells, modulating transcription of genes involved in keratinocyte differentiation and proliferation. It normalises follicular keratinisation, prevents microcomedo formation, and exhibits anti-inflammatory activity by inhibiting lipoxygenase and arachidonic acid metabolism. Unlike tretinoin it is photostable and less irritating.
Target: Retinoic acid receptors (RAR)
Nuclear receptors in skin cells that control gene programs for growth, differentiation and shedding of keratinocytes; retinoids steer these programs so follicles do not clog.
Approved uses
Approved uses differ by country and change over time. Always follow your local prescribing information.
Approved uses in United States
FDAas of Aug 22, 2026- For the topical treatment of acne
Official sources
The statements on this page trace back to these records.
- DailyMed: adapalene gel label
DailyMed, U.S. National Library of Medicine · Retrieved Aug 22, 2026
- U.S. Food and Drug Administration: adapalene prescribing information
U.S. Food and Drug Administration · Retrieved Aug 22, 2026
- MedlinePlus: adapalene
MedlinePlus, U.S. National Library of Medicine · Retrieved Aug 22, 2026
- National Cancer Institute: adapalene
National Cancer Institute · Retrieved Aug 22, 2026
Editorial review
- Reviewed
- Aug 23, 2026
- Next review
- Feb 23, 2027
- Cross-checked by
- researcher-regulatory - FDA label and DailyMed · researcher-nlm - MedlinePlus and NCI · editor - plain-language paraphrase and cross-check
- Method
- independent multi-source collection -> cross-check for agreement -> original English paraphrase -> item-by-item verification against the evidence bundle
MedUnfold provides educational content and is not medical advice. Always follow your local prescribing information and healthcare professional.