Ingredient guide · free · every answer cites its source
How to start tretinoin
- 1What it is
- 2Start route
- 3Pairing
A guide to the general plan, not a diagnosis · AAD · Cleveland Clinic · FDA
The schedule comes from the sources.
Your face decides the pace.
This is the general plan for the ingredient, not for your skin. MySkincare scans your face in 3 photos, then builds a routine from that, the products you already use and their ingredients — checked to work together.
Scan my skin in MySkincareFree scan: your skin score. Zone by zone: with a plan.
A guide to what the sources report, not a prediction for your skin.
What to expect from tretinoin
Tretinoin is retinoic acid, a prescription drug for acne and fine wrinkles. This page sticks to its FDA labels, week by week. Your prescriber’s instructions come first.
- Sold
- Prescription only
- Use
- Once a day, at bedtime
- Wait
- 20–30 min after washing
- Pregnancy
- Avoid
Prescription drug. This plan shows what the FDA labels say and the AAD’s gentler start. It doesn’t replace your prescriber’s instructions.
Tretinoin, explained
What tretinoin does
Tretinoin is retinoic acid, the active form retinol gets converted into. Its FDA labels approve it for acne vulgaris, and one 0.02% cream for softening fine facial wrinkles. That label is blunt: it “does not eliminate wrinkles” or “repair sun-damaged skin.”
Why you need a prescription
In the US it’s a prescription drug: the AAD lists it with tazarotene and trifarotene as prescription retinoids. If you want a retinoid without one, adapalene 0.1% gel is sold over the counter for acne, and retinol is sold as a cosmetic.
The early weeks
MedlinePlus says acne will probably get worse, with red, scaling skin and more sores, during the first 7 to 10 days. The label says a flare can happen in the early weeks and isn’t a reason to stop; the patient leaflet says new blemishes can appear by weeks 3 to 6. In the wrinkle-cream trials, 32% had severe irritation at some point.
When to call your prescriber
The label says to apply it less often, pause, or stop if irritation is significant, and not to use it on sunburned skin until it heals. MedlinePlus lists itching, rash, hives and pain at the treatment area as reasons to call your doctor right away.
Sun, wind and pregnancy
Keep sun and sunlamps to a minimum, and use sunscreen and protective clothing when you can’t avoid them; wind or cold may irritate treated skin. The AAD says most experts recommend stopping tretinoin during pregnancy, and the 0.02% wrinkle cream’s label says it should not be used during pregnancy.
Strengths, OTC or prescription
Every strength needs a prescription. The number is the percentage of tretinoin; the label we read for acne covers five creams and gels, and a separate label covers a 0.02% cream for wrinkles.
| Strength | Sold as | What the source says |
|---|---|---|
| 0.01%Gel | Prescription | The lowest acne strength: once a day at bedtime, enough to cover the area lightly.Tretinoin label |
| 0.02%Cream | Prescription | For fine facial wrinkles: a pearl-sized amount once a day in the evening; up to 6 months for effects.Tretinoin 0.02% label |
| 0.025%Cream or gel | Prescription | On the acne label in both bases.Tretinoin label |
| 0.05%Cream | Prescription | Acne. In a 24-week study on sun-damaged skin, adapalene 0.3% gel was non-inferior to it.Tretinoin labelBagatin 2018 |
| 0.1%Cream | Prescription | The highest strength on the acne label.Tretinoin label |
Pairing tretinoin: what to check
Tretinoin isn’t one of the 9 actives in our mixer. Its label asks for caution with medicated or abrasive soaps, strongly drying products, products high in alcohol, astringents, spices or lime, and peeling agents such as sulfur, resorcinol or salicylic acid. MedlinePlus adds: no other skin medicines, especially benzoyl peroxide, unless your doctor says so. Tretinoin labelMedlinePlus: tretinoin
Myths, checked
“More cream clears acne faster”
The AAD says applying more than your dermatologist recommends will not clear acne faster. The label asks for just enough to cover the area lightly.
“The early flare means it isn’t working”
The label says an apparent flare in the early weeks isn’t a reason to stop, and the patient leaflet expects improvement after 6 to 12 weeks.
“Tretinoin erases wrinkles”
The label of the 0.02% wrinkle cream says it does not eliminate wrinkles, repair sun-damaged skin or reverse photoaging. It’s approved to soften fine lines.
More ingredient guides
Put it in your routine order →Purging or breakout? →Pregnancy-safe check →
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Questions people ask
What does tretinoin do?
It treats acne, and a 0.02% cream is approved to soften fine facial wrinkles (MedlinePlus, FDA labels). It’s retinoic acid, the active form of vitamin A in skin. MedlinePlus: tretinoinTretinoin labelTretinoin 0.02% label
Which strength is best: 0.025%, 0.05% or 0.1%?
Your prescriber decides. The acne label we read covers 0.025%, 0.05% and 0.1% cream and 0.01% and 0.025% gel, all used the same way: once a day at bedtime, enough to cover the area lightly. The AAD’s general advice for retinoids is to start with the least-intense formula. Tretinoin labelAAD: retinoids
How long does tretinoin take to work?
For acne, the label says results should show after 2 to 3 weeks, sometimes more than 6, and the leaflet expects continued improvement after 6 to 12 weeks. For wrinkles, the 0.02% label says up to 6 months. Check your own start dates → Tretinoin labelTretinoin 0.02% label
Can I buy tretinoin over the counter?
No, it needs a prescription in the US. Adapalene 0.1% gel is the retinoid sold over the counter for acne. Adapalene guide → AAD: retinoidsAdapalene 0.1% label
Is it OK to use tretinoin every other night?
The labels say once a day. If irritation is significant, they say to apply it less often, pause or stop, and the AAD says retinoids are often started every other night. Ask your prescriber which fits you. Tretinoin labelAAD: retinoids
How long should I wait after washing to apply tretinoin?
20 to 30 minutes, so your skin is fully dry (both labels). The 0.02% wrinkle cream label adds: don’t wash the area for at least an hour afterwards. Tretinoin labelTretinoin 0.02% label
Retinol vs tretinoin?
Retinol is converted into tretinoin in skin and is about ten times less potent (2022 review). Retinol guide → 2022 review
Can I use tretinoin while pregnant?
The AAD says most experts recommend stopping it during pregnancy. The acne label says to use it only if the benefit justifies the risk to the fetus, and the 0.02% label says not to use it during pregnancy. Pregnancy-safe check → AAD: acne in pregnancyTretinoin labelTretinoin 0.02% label
Sources
- Plan steps marked “expert consensus” (1 on this page) have no study or label behind their timing
- Not medical advice
American Academy of Dermatologyaad.org
- Retinoid or retinol? (updated May 2021)
Least-intense formula, every other night to start, slowly building up; only at night, sun protection by day; not during pregnancy; irritation can leave dark marks on darker skin; people with skin allergies or dryness probably not good candidates; retinol % need not be disclosed; tretinoin, tazarotene and trifarotene are prescription.
- Acne diagnosis and treatment (updated June 2024)
At least 6 to 8 weeks to see fewer breakouts; more medicine won’t clear acne faster; retinoids clear pores and fade dark spots, applied in the evening; benzoyl peroxide reduces bacteria and works best with another treatment; salicylic acid opens clogged pores and exfoliates; azelaic acid opens pores, fights bacteria, reduces inflammation and fades dark spots.
- Is any acne treatment safe to use during pregnancy?
Tretinoin and adapalene: most experts recommend stopping; azelaic acid thought to be safe; benzoyl peroxide safe in limited amounts; salicylic acid generally safe for a limited time; ask your OB-GYN or dermatologist.
DailyMed, US National Library of Medicinedailymed.nlm.nih.gov
- Tretinoin cream and gel: FDA label (DailyMed)
Cream 0.025%, 0.05%, 0.1% and gel 0.01%, 0.025% for acne; once a day before bedtime, enough to cover the area lightly, 20 to 30 minutes after washing; apply less often or pause if irritated; early-weeks flare is not a reason to stop; results after 2 to 3 weeks, sometimes more than 6; new blemishes by weeks 3 to 6, improvement after 6 to 12 (leaflet); sun, sunlamps, wind and cold; products to use with caution; pregnancy and nursing wording.
- Adapalene gel 0.1%: OTC Drug Facts label (DailyMed, Dec. 2022)
For acne, ages 12 and up; once a day, never more; a thin layer over the whole affected area on clean dry skin; irritation most likely in the first few weeks; acne may look worse before it improves; up to 3 months; sun, tanning beds, waxing; pregnancy and breastfeeding: ask a doctor.
MedlinePlus, US National Library of Medicinemedlineplus.gov
- Tretinoin topical (revised Dec. 2025)
Used for acne and fine wrinkles; once a day at bedtime; acne probably worse in the first 7 to 10 days; 2 to 3 weeks (sometimes more than 6) to improve; side effects; no other skin medicines, especially benzoyl peroxide, unless a doctor says so.
US Food and Drug Administrationfda.gov
- Tretinoin cream 0.02% for fine facial wrinkles: FDA label (FDALabel, rev. Nov. 2025)
Once a day in the evening, a pearl-sized amount (about ¼ inch), 20 to 30 minutes after washing; does not eliminate wrinkles; up to 6 months for effects; local reactions early in treatment, severe irritation in 32%; SPF 15 or more; should not be used during pregnancy.
Studies and other sources
- Adv Ther, 2022: review of retinoids in topical anti-aging treatmentlink.springer.com
Retinol is converted to retinoic acid via retinaldehyde and is about tenfold less potent than tretinoin; 0.3% maximum recommended in face creams; most studies used 0.075% to 0.5%, and two comparisons with tretinoin used 0.25% to 1%; side effects are dose-dependent; start low, raise gradually, use moisturizers.
- Bagatin et al., Comparable efficacy of adapalene 0.3% gel and tretinoin 0.05% cream as treatment for cutaneous photoaging, Eur J Dermatol, 2018 (abstract read via Europe PMC)pubmed.ncbi.nlm.nih.gov
Once a day for 24 weeks, adapalene 0.3% gel was non-inferior to tretinoin 0.05% cream on signs of photoaging, with a similar safety profile.