Adapalene vs Tretinoin: What the Evidence Shows
Adapalene vs tretinoin studies found similar overall acne lesion reduction for adapalene 0.1% gel and tretinoin 0.025% gel, with less irritation reported for adapalene in several trials. That evidence does not rank every strength or product, and a percentage alone cannot rank them.
In the UK, eMC lists Differin Gel (adapalene) as prescription-only and Treclin, a gel containing tretinoin with clindamycin, as prescription-only. Topical retinoids should not be used during pregnancy or when trying to conceive.
Most of the available adapalene vs tretinoin evidence compares acne treatments; photoageing has one smaller study.
Adapalene vs tretinoin at a glance
Adapalene and tretinoin are different topical retinoids, and their percentages do not form a direct strength scale. Most acne comparisons in this evidence set tested adapalene 0.1% gel against tretinoin 0.025% gel. A separate photoageing study tested adapalene 0.3% gel against tretinoin 0.05% cream.
| Question | Adapalene | Tretinoin |
|---|---|---|
| What is it? | A synthetic topical retinoid | All-trans retinoic acid, a topical retinoid |
| Acne comparison most often discussed here | 0.1% gel | 0.025% gel |
| Overall acne result in a five-trial meta-analysis | Similar total-lesion reduction to the tested tretinoin gel | Similar total-lesion reduction to the tested adapalene gel |
| Irritation in several comparisons | Lower irritation scores in the tested comparisons | Results varied by strength and formulation |
| Photoageing comparison | 0.3% gel in one 24-week study | 0.05% cream in that study |
| UK product status | Differin Gel (adapalene) is prescription-only on eMC | Treclin, a tretinoin and clindamycin gel, is prescription-only on eMC |
The studies do not cover every available product or predict how an individual will respond. For general treatment context, see our guide to tretinoin for acne.
The chart shows search interest, not treatment results or patient outcomes.Tretinoin vs adapalene: what acne studies found
In a meta-analysis of five randomised comparative trials involving 900 people with mild-to-moderate acne, adapalene 0.1% gel and tretinoin 0.025% gel produced similar overall total-lesion reduction. The authors reported earlier improvement in some lesion measures and greater local tolerability with adapalene, but the abstract gives no effect size or confidence interval (Cunliffe et al., PMID 9990421).
| Study and design | Participants and duration | Compared formulations | What the abstract reports |
|---|---|---|---|
| Meta-analysis of five randomised, investigator-blind trials | 900 people; follow-up varied and is not stated in the abstract | Adapalene 0.1% gel and tretinoin 0.025% gel | Similar total-lesion reduction overall; better local tolerability and earlier change in some measures with adapalene (PMID 9990421) |
| Randomised, investigator-masked clinical trial | 105 people; 12 weeks | Adapalene 0.1% gel and tretinoin 0.025% gel | Some lesion counts improved more at week one with adapalene; by week 12 there was no significant difference in measured variables (PMID 9990418) |
| Randomised, masked split-face tolerance study | 15 acne volunteers; 14 days | Adapalene 0.1% gel and tretinoin 0.025% gel, once daily on opposite sides | Combined irritation score was higher with tretinoin; the study was too small and short to compare acne clearance (PMID 9204087) |
| Clinical and bio-instrumental split-face comparison | 25 volunteers with moderately severe acne; six weeks | Adapalene 0.1% gel and tretinoin 0.05% gel | Tretinoin had greater comedolysis and clinical improvement in this comparison; erythema was temporarily greater on that side (PMID 10325486) |
| Randomised, investigator-masked split-face tolerability and preference trial | 40 acne patients; four weeks | Adapalene 0.1% gel and tretinoin microsphere 0.1% gel | Less stinging or burning was reported with adapalene; preference does not establish comparative efficacy (PMID 11845944) |
An irritation study of 55 healthy volunteers compared adapalene 0.1% gel with six tretinoin formulations over 21 days. Adapalene had lower cumulative irritation scores in that model (Galvin et al., PMID 9990419). Healthy volunteers in an irritation test are not the same as people using acne treatment over the long term.
In the five-trial meta-analysis, the two gels had similar overall acne outcomes, while several comparisons found lower irritation scores with adapalene. One smaller study used tretinoin 0.05% and reported greater comedolysis. These results apply to the tested strengths and vehicles; they do not establish that all adapalene products work like all tretinoin products.
Adapalene 0.3 vs tretinoin for photoageing
One randomised, investigator-blinded comparison studied adapalene 0.3% gel and tretinoin 0.05% cream for photoaged skin over 24 weeks. The abstract reports no significant difference on its listed clinical outcomes and describes adapalene as non-inferior, with a similar safety profile. It does not state the participant count or non-inferiority margin (Bagatin et al., PMID 30105991).
That 0.3% gel and 0.05% cream comparison does not establish an effect for adapalene 0.1% acne gel or show how either formulation compares with other strengths, vehicles or skincare routines. Our page on what before-and-after photos can show explains why photographs alone may not settle those questions.
Which is stronger, adapalene or tretinoin?
Concentration alone cannot show which retinoid is stronger because the medicines and formulations differ. A percentage describes the amount of an active ingredient in a product. It does not directly compare clinical effect, irritation or delivery between two different molecules.
The five-trial analysis compared 0.1% adapalene gel with 0.025% tretinoin gel for acne. A separate small study compared adapalene 0.1% with tretinoin 0.05% and favoured tretinoin for comedolysis. Those are results from defined study settings, not a cross-product potency ladder.
Read more about tretinoin concentrations and ask a prescriber which evidence applies to the product under consideration. A prescriber should guide any change to a prescription retinoid.
Illustrative gel textures only; this image does not show a clinical result.Adapalene or tretinoin for acne, comedones or ageing?
Both medicines are topical retinoids used in acne care, but the comparative results depend on the tested formulation and outcome. The UK Differin Gel SmPC states that the product is indicated for acne vulgaris where comedones, papules and pustules predominate.
For someone comparing acne options, the evidence here is most direct for adapalene 0.1% gel and tretinoin 0.025% gel. It does not compare all acne severities, all formulations or every other treatment a clinician might consider. If acne is painful, persistent or causing scars, speak to a GP or dermatologist. Our guide to tretinoin and sensitive skin covers irritation questions in more detail.
The photoageing evidence is narrower. One 24-week study compared adapalene 0.3% gel with tretinoin 0.05% cream. It does not establish that ordinary adapalene 0.1% acne products are wrinkle treatments. If ageing or sun damage is your main concern, ask a prescriber about the evidence and licensed product information before considering a medicine.
Side effects, irritation and pregnancy
The Differin Gel SmPC lists these as common adverse effects: dry skin, irritation, burning sensation and erythema. It also advises discontinuing treatment if a reaction suggests sensitivity or severe irritation.
- Dry skin
- Skin irritation
- Burning sensation
- Erythema
The comparative studies often found less irritation with adapalene in the specific comparisons described above. That does not guarantee an easier experience for every person. The formulation, prescribed directions and individual skin response matter. See our guide to tretinoin side effects and the related tretinoin purge discussion.
Topical adapalene and tretinoin should not be used during pregnancy or when trying to conceive. NICE says topical retinoids are contraindicated during pregnancy and when planning a pregnancy (NICE NG198, recommendation 1.5.8). Speak with your prescriber if pregnancy is possible or planned.
Can you switch or use both together?
A prescriber should guide a switch between adapalene and tretinoin because the studies do not provide a self-directed switching schedule. The prescribed strength, formulation, response and other medicines all matter.
- Before an appointment, note the medicine name and strength, how often you use it, other acne treatments, and when any irritation or change began.
- Ask whether to continue, pause or switch. Follow the instructions for your product, and check with a pharmacist if the directions are unclear.
The studies reviewed here did not test adapalene and tretinoin together or on alternate days. Do not combine or alternate them unless your prescriber has specifically advised it. For a named adapalene and benzoyl peroxide product, see the Epiduo SmPC. It does not establish a routine for combining separate products.
Is Differin the same as tretinoin?
Differin is a brand of adapalene; tretinoin is all-trans retinoic acid. Adapalene is a synthetic retinoid. They belong to the same broad medicine family and have distinct active ingredients with separate product information.
The eMC lists Differin Gel as a prescription-only medicine for acne. Its product information describes once-daily evening use, but follow the directions on your own prescription and leaflet. Treclin, a gel containing tretinoin and clindamycin, is listed by eMC as prescription-only. This listing does not establish the status of every product sold under another name.
Is adapalene over the counter in the UK?
The eMC lists Differin Gel (adapalene) as prescription-only in the UK. Treclin, a gel containing tretinoin with clindamycin, is also listed as prescription-only. These sources verify the named products; a pharmacist can check the status of a specific medicine.
Do not rely on US webpages for UK supply rules. If you have questions about a medicine you were prescribed or obtained elsewhere, show the packaging and leaflet to a UK pharmacist or prescriber. The adapalene gels this store lists are on our adapalene category page.
When to stop and speak to a clinician
Stop and speak to a GP, pharmacist or dermatologist if you have severe irritation or a suspected sensitivity reaction, or if acne is becoming painful, persistent or scarring. Bring the product packaging or a clear name and strength. Describe any other acne medicines and explain what changed, when it started and whether it is improving. Contact your prescriber if pregnancy is possible or planned, or if you are unsure whether to continue treatment.
Frequently asked questions
Is adapalene or tretinoin better for acne?
In a meta-analysis of five randomised trials involving 900 people with mild-to-moderate acne, adapalene 0.1% gel and tretinoin 0.025% gel produced similar overall total-lesion reduction. Several comparisons reported less irritation with adapalene. The results apply to those formulations and do not identify a universally suitable medicine. A prescriber can consider your diagnosis, previous treatment and skin response.
Which is stronger, adapalene or tretinoin?
There is no sound way to rank the two medicines by concentration alone. Adapalene 0.1% and tretinoin 0.025% are different molecules in different formulations. Studies compare outcomes such as lesion counts or irritation, and those outcomes do not create a single potency scale. Ask your prescriber what a particular product is intended to treat and how its evidence applies to you.
Can I replace tretinoin with adapalene?
A prescriber may review a switch if acne remains active or irritation is difficult to manage. Tell them the exact product, strength, how you use it and what has changed. Do not stop, overlap or alternate prescription retinoids on your own. The comparative trials do not establish a switching schedule, and the right plan depends on your prescription and clinical history.
Is Differin the same as tretinoin?
No. Differin is a brand name for adapalene, while tretinoin is a different topical retinoid. Both are used in acne treatment, but their strengths, formulations and product information differ. In the UK, eMC lists Differin Gel as a prescription-only medicine. Check the leaflet for the specific product you have and ask a pharmacist if its identity is unclear.
Does Differin work for wrinkles?
The evidence here includes one 24-week photoageing comparison of adapalene 0.3% gel with tretinoin 0.05% cream. It does not establish an anti-wrinkle effect for adapalene 0.1% acne gel or every Differin product. The study abstract also omits the participant count and non-inferiority margin. Discuss any use outside the product indication with a prescriber.
Is adapalene over the counter in the UK?
No. The eMC lists Differin Gel (adapalene) as prescription-only in the UK and Treclin, a gel containing tretinoin with clindamycin, as prescription-only. These sources verify the named products. Overseas websites may describe different rules, so ask a UK pharmacist or prescriber about a specific product.
Can you use adapalene and tretinoin together?
The studies reviewed for this comparison did not test adapalene and tretinoin used together or on alternate days. Combining two topical retinoids may add irritation, and the evidence here cannot set a safe schedule. Use them together only if your prescriber has specifically advised it. Ask a pharmacist or prescriber before adding another acne medicine.
How we wrote this
We reviewed the linked PubMed abstracts, NICE acne guidance and UK product information on eMC, and kept each study's design, population and duration beside its result. The acne findings mostly concern older head-to-head trials of specific gels; one photoageing abstract omits its participant count and non-inferiority margin. These studies cannot predict an individual response or establish a universal strength ranking.
This article is general information, not medical advice. Last updated: November 2026. Corrections: support@buytretinoin.org
