What is Adapalene?
Adapalene (brand name: Differin; INCI: Adapalene) is a third-generation synthetic retinoid developed in the 1980s and approved for the topical treatment of acne vulgaris. Unlike tretinoin (all-trans retinoic acid), which binds broadly to all retinoic acid receptor subtypes, adapalene selectively binds to RAR-beta and RAR-gamma receptors in the skin. This selective binding is why adapalene is significantly less irritating than tretinoin while maintaining comparable efficacy for acne.
Adapalene is available as a 0.1% gel or cream formulation. In the United States, it became available over the counter (as Differin gel) in 2016. In India, adapalene-containing products like Adaferin gel (Galderma) are available at pharmacies and are sometimes accessible without a prescription, though they are technically recommended under medical supervision. Combination products pairing adapalene with benzoyl peroxide (like Epiduo) offer synergistic acne coverage.
Its photostability is a key advantage over tretinoin: adapalene is stable in sunlight, making it more suitable for daytime use, though applying sunscreen is still essential.
Why does Adapalene cause reactions?
Even though adapalene is the most tolerable retinoid in its class, it still belongs to the retinoid family and carries the same fundamental irritation risks — just at a reduced magnitude. The skin adjustment period (often called "adapalene purging" or retinoid dermatitis) involves:
- Dryness: Cell turnover acceleration leads to peeling and flaking, particularly in the first 2–4 weeks
- Redness: Mild inflammatory response as skin adjusts to receptor activation
- Stinging: Particularly on broken, sensitized, or eczema-affected skin where the barrier is already compromised
- Photosensitivity: Adapalene thins the outer skin layer, increasing UV vulnerability
- Eczema exacerbation: For individuals with atopic dermatitis, the barrier disruption from adapalene can precipitate flares in the treated area or adjacent eczema-prone areas
The irritation is generally manageable through gradual introduction — starting with every-other-night application and increasing frequency as tolerance builds. Most people achieve full daily tolerance within 4–8 weeks.
Where is Adapalene found in products?
Adapalene is found exclusively in therapeutic skincare products:
- Adapalene 0.1% gel: The standard formulation for acne (Adaferin, Differin)
- Adapalene 0.3% gel: Higher concentration for more resistant acne (prescription-only)
- Adapalene + benzoyl peroxide combinations: 0.1% adapalene + 2.5% BPO (Epiduo) for inflammatory acne
It does not appear in regular cosmetic products — it is a drug ingredient, not a cosmetic one. Any product listing "adapalene" in its ingredient list is either a drug product or is mislabeled.
How to spot Adapalene on labels
On drug product labels:
- Adapalene — the INCI and INN name
- Differin — original US brand name (Galderma)
- Adaferin — common Indian brand name (Galderma India)
Adapalene will appear in the active ingredients section of drug labels, typically listed as "Adapalene 0.1%" or "Adapalene 0.3%."
In Indian products 🇮🇳
In India, adapalene is most commonly available as Adaferin gel 0.1% from Galderma, which is sold at pharmacies and is frequently recommended by dermatologists for mild-to-moderate acne. It is also found in combination formulations with benzoyl peroxide or clindamycin at various dermatology clinics.
Indian dermatologists frequently recommend adapalene for teenage acne patients and adults dealing with post-inflammatory hyperpigmentation (PIH) — a significant concern for Indian skin tones, which are more prone to pigmentation after acne lesions. However, the concomitant use of adapalene in eczema patients is approached with caution, especially during active flares.
For Indian users with both acne and eczema (a not-uncommon combination), a dermatologist may prescribe adapalene for acne but only after the eczema is well-controlled, and typically with concurrent barrier-repair moisturizer use.
Safer alternatives
- Azelaic acid (15–20%): Effective for both acne and PIH without retinoid-class irritation; prescription or OTC depending on concentration
- Benzoyl peroxide (2.5–5%): Targets acne bacteria without retinoid side effects; available OTC in India
- Salicylic acid (1–2%): Keratolytic that unclogs pores gently; widely available and generally well-tolerated
- Niacinamide (5–10%): Reduces sebum production and PIH without irritation; ideal for eczema-acne dual skin types
- Bakuchiol: Plant-derived alternative with retinoid-like gene expression without receptor binding; suitable for very sensitive or eczema-prone acne skin