Adapalene vs tretinoin for acne: what differs

Adapalene and tretinoin are both topical retinoids approved for acne, and they are the two most often compared. Adapalene 0.1 percent gel is sold over the counter, and tretinoin needs a prescription. Past that, their labels differ in ages, timing, warnings and directions, and the guidelines do not rank one above the other. This guide sets the labels side by side, using DailyMed labels for Differin, Retin-A, Retin-A Micro, Atralin and Altreno, plus the 2024 American Academy of Dermatology (AAD) guideline and NICE. It is part of Skinli's guide to retinoids for acne.

The two side by side

	Adapalene	Tretinoin
Prescription needed	Not for the 0.1 percent gel. Yes for the 0.3 percent gel and the cream	Yes
Forms in the labels read	Gel, cream	Cream, gel, microsphere gel, lotion
When to apply	Once daily. The prescription labels say evening or nighttime	Once daily. Most labels say evening or before bedtime
Time to results on the label	Up to 3 months (over the counter). At least eight weeks for consistent benefit (cream)	Results after 2 to 3 weeks, but more than 6 weeks may be required (Retin-A)
Age on the label	12 and older for the over-the-counter gel	Not established below 12 (Retin-A), 12 and older (Retin-A Micro), 9 and older (Altreno)
Named in NICE first-line combinations	With benzoyl peroxide	With clindamycin

How each one works

The two drugs act on the same problem, blocked pores, by different routes, and the sources describe them separately. MedlinePlus says tretinoin "works by increasing production of new skin cells and unclogging pores," and that adapalene "works by stopping pimples from forming under the surface of the skin." The Retin-A Micro label says tretinoin increases the turnover of the cells that line hair follicles, which causes the blocked material in comedones to be pushed out, and that it decreases the cohesiveness of those cells so that fewer early pore plugs, called microcomedones, form. The 2024 AAD guideline adds that each retinoid binds to a different set of retinoic acid receptors, which is why efficacy and tolerability can differ between products. It calls topical retinoids comedolytic, which means they clear blocked pores, and anti-inflammatory.

Which one is better

The 2024 AAD guideline recommends topical retinoids for acne with a strong rating, on moderate certainty evidence from 20 studies. It names four: tretinoin, adapalene, tazarotene and trifarotene. On the question of which to pick, it says: "Existing comparative effectiveness data do not suggest superiority of one topical retinoid against another, with efficacy and tolerability differing by specific concentrations and formulations."

Skinli read the guideline text from a copy archived in March 2025. A correction notice for the guideline was published in July 2026, and Skinli has not seen what it changes.

For blackheads and whiteheads specifically, Skinli's guide to adapalene for blackheads and whiteheads sets out what the AAD says.

So the choice rests on practical points: whether you can buy the product without a prescription, which ages the label covers, what the label says about pregnancy, and how your skin tolerates it. The AAD guideline states that "Adapalene 0.1% gel is available over the counter while other topical retinoids are available by prescription only." The NHS says prescription treatments from a GP or skin specialist are stronger than products sold in pharmacies and shops.

Which one is stronger

No source read for this guide ranks adapalene and tretinoin by strength. The guideline says efficacy and tolerability depend on the concentration and the formulation. It also says irritation "may be particularly common at higher concentrations," which reduced frequency of use and a moisturizer may help. The word strength therefore describes a specific product, such as Retin-A Micro at 0.1 percent or Differin Gel at 0.3 percent, and not adapalene or tretinoin as a whole.

How they are applied

Both are used once daily, and most prescription labels for both say evening or bedtime. The Retin-A cream and gel label says to apply it "once a day, before retiring." The prescription Differin Gel 0.3 percent label says to apply it once daily in the evening. The over-the-counter Differin Gel 0.1 percent label says to use it once daily and names no time.

The 2024 guideline adds a point about tretinoin. It says some tretinoin formulations should be applied in the evening because they are sensitive to light, and should not be applied with benzoyl peroxide, so that the tretinoin does not break down and stop working. It says tretinoin microsphere formulations, adapalene and tazarotene lack similar restrictions.

The Retin-A label also advises waiting: "WAIT 20 TO 30 MINUTES BEFORE APPLYING MEDICATION; it is important for skin to be completely dry in order to minimize possible irritation." An AAD page on skin care in your 20s gives the same 20 to 30 minute wait after washing for a retinoid.

How long each takes to show results

The labels give overlapping timelines. The Retin-A label says "Therapeutic results should be noticed after 2 to 3 weeks but more than 6 weeks of therapy may be required before definite beneficial effects are seen." The Retin-A Micro label says improvements may be noticed after two weeks, but more than seven weeks of therapy may be needed for sustained benefit. The adapalene cream label says overall clinical benefit may be noticed after two weeks but at least eight weeks are required to obtain consistent beneficial effects. The over-the-counter Differin Gel 0.1 percent label says it may take up to 3 months of once daily use to see results.

NICE, writing about acne treatment in general, says positive effects can take 6 to 8 weeks to become noticeable, and that a first-line course lasts 12 weeks. The labels of both drugs also say acne may look worse in the early weeks. Skinli's guide to whether retinol makes acne worse at first sets out what the sources say about that.

Irritation, sun and weather

Both drugs irritate skin. The prescription Differin label lists redness, scaling, dryness and stinging or burning. The Retin-A label says topical use may induce severe local redness and peeling, and the Retin-A Micro label lists excessive dryness, redness, swelling, peeling, itching, blistering, burning or stinging. No source read for this guide compares the irritation of the two.

For sun, both labels say to minimize exposure and to use sunscreen and protective clothing when exposure cannot be avoided. The Retin-A label adds that patients with sunburn should not use the product until fully recovered. Sunscreen strength differs by source: the Retin-A Micro and Atralin labels say SPF 15 or higher, and the AAD says SPF 30 or higher. The Retin-A label also says that weather extremes, such as wind or cold, may be irritating.

Using both, or with other products

An NHS hospital leaflet on adapalene says other retinoid products should not be used while you are using it, and that advice describes the UK. The Retin-A label says other topical medication used at the same time and products that have a strong drying effect should be used with caution because of possible interaction with tretinoin, and it names sulfur, resorcinol and salicylic acid for particular caution. The Retin-A Micro label says benzoyl peroxide, sulfur, resorcinol or salicylic acid may increase the risk of dryness, redness and peeling. For adapalene, the over-the-counter label says irritation is more likely if you use more than one topical acne medication at a time.

Combinations exist as single products. NICE offers a fixed combination of adapalene with benzoyl peroxide, and tretinoin with clindamycin, as first-line options. Skinli's guide to using a retinoid with benzoyl peroxide and its guide to what to mix with a retinoid cover the details.

Ages and pregnancy

Labels set ages differently. Differin Gel 0.1 percent covers people 12 and older. Retin-A says safety and effectiveness below age 12 have not been established, Retin-A Micro is indicated from age 12, Atralin says safety below age 10 is not established, and Altreno is indicated from age 9. See Skinli's guide to retinoids for teens.

Pregnancy wording differs too. The over-the-counter Differin label says to ask a doctor if pregnant or breast-feeding, and the Retin-A and adapalene cream labels say the drug should be used in pregnancy only if the potential benefit justifies the potential risk. NICE says topical retinoids should not be used during pregnancy and when planning a pregnancy, and the AAD says most experts recommend stopping adapalene and tretinoin during pregnancy. Skinli's guide to retinoids during pregnancy and breastfeeding sets out each source.

When to ask a doctor

If you want tretinoin, you need a prescription, so a doctor or dermatologist has to decide. See a doctor if your acne is painful, cystic, getting worse, or has not improved after a few months of steady care. NICE says that if acne fails to respond adequately to a 12-week course of a first-line treatment, a different option should be offered.