Ingredient
Tretinoin: the prescription retinoid explained
Tretinoin is retinoic acid, the form of vitamin A that skin cells act on directly. It has some of the strongest evidence in skincare for acne and sun-related wrinkles, but it is prescription-only in the US, irritating at first and not for pregnancy. Here is what it does, how strong it comes and who it suits.
Tretinoin is a prescription retinoid (retinoic acid) used on the skin to treat acne and to improve fine wrinkles, rough texture and blotchy pigment from sun damage. It works directly on skin cells, which makes it stronger than over-the-counter retinol but also more irritating. In the US it comes as creams from 0.025% to 0.1%, gels at 0.01% and 0.025%, and other forms. Expect dryness and peeling at first, use sunscreen daily, and avoid it if you are pregnant or trying to conceive.
- Tretinoin is the active form of vitamin A, so it does not need converting in the skin like retinol does.
- Its evidence is strongest for acne and for sun-damage wrinkles, but results take weeks for acne and months for aging.
- Irritation is the main side effect; pregnancy is the main reason to avoid it.
The basics
What is tretinoin?
Tretinoin is the drug name for all-trans retinoic acid, sold as Retin-A and as generics. It belongs to the retinoids, the vitamin A family that also includes retinol, retinal and adapalene.
Retinol and retinal have to be converted by skin enzymes into retinoic acid before they act, so a lot of their strength is lost on the way. Tretinoin skips that step. That is why it is more effective, more irritating and, in the US, available only with a prescription; see is retinol prescription? for where OTC and prescription retinoids divide.
| Retinoid | Access in the US | Relative strength | Typical use |
|---|---|---|---|
| Retinol | OTC | Mild, needs conversion | Early aging, texture |
| Retinal | OTC | Between retinol and tretinoin | Aging, texture |
| Adapalene 0.1% | OTC | Strong for acne, gentler feel | Acne, clogged pores |
| Tretinoin | Prescription | Strong; most irritating common retinoid | Acne, photoaging, pigment |
For deeper head-to-heads, see retinol vs tretinoin and adapalene vs tretinoin.
Evidence
What does tretinoin do for skin?
| Use | Evidence | What to know |
|---|---|---|
| Acne | Strong | Unclogs pores and prevents new comedones; the Retin-A label says clear benefit can take more than 6 weeks. |
| Fine and coarse wrinkles from sun | Strong | A 2025 meta-analysis of 8 randomized trials (1,361 people) found tretinoin beat a placebo cream for both fine and coarse wrinkles. |
| Rough texture, dullness | Good | Faster cell turnover smooths the surface over months. |
| Dark spots and melasma | Moderate | Part of the triple cream for melasma that DermNet describes as the most successful topical regimen. |
| Thin, crepey skin | Limited to moderate | May help sun-related texture; it cannot restore lost firmness. See crepey skin. |
DermNet notes improvement in acne may take 12 weeks or longer and that benefits for sun-aged skin come with long-term use beyond six months. Tretinoin is a slow, steady treatment, not a quick fix.
Concentrations
What strengths does tretinoin come in?
According to the Retin-A prescribing information, the brand comes as a cream at 0.025%, 0.05% and 0.1%, a gel at 0.01% and 0.025%, and a liquid at 0.05%. Other brands, including microsphere gels and lotions, use their own strengths, and the photoaging trials in the 2025 meta-analysis used a range of formulations.
0.025% cream or 0.01% gel
Common starting strengths, especially for sensitive or dry skin.
0.05% cream
Often used once skin has adjusted, for acne or aging.
0.1% cream
More potent and more irritating; usually reserved for skin that tolerates lower strengths.
Cream vs gel
DermNet notes creams are the least irritating form and gels the least visible on the skin.
Higher strength is not automatically better. A lower strength you use consistently will usually do more than a stronger one you keep stopping. For application steps and a starting schedule, read how to use tretinoin.
Pairing
What can you use with tretinoin?
Works well with
- Gentle cleansers and fragrance-free moisturizers.
- Daily broad-spectrum sunscreen.
- Ceramides, glycerin, hyaluronic acid and niacinamide.
- Azelaic acid, often at a different time of day.
Be careful with
- Salicylic acid, glycolic acid, sulfur and resorcinol on the same skin; the label advises caution.
- Benzoyl peroxide applied at the same time, which can irritate and may reduce tretinoin’s effect.
- Scrubs, astringents and alcohol-heavy products.
- Waxing and hair-removal creams on treated areas.
The same rules that apply to retinol apply more strongly here; our guide to ingredients not to mix with retinol explains how to split actives between morning and night.
Side effects
What are the side effects of tretinoin?
The most common effects are dryness, peeling, redness, stinging and mild burning in the first 2 to 4 weeks, according to the Kaiser Permanente drug guide; these usually ease with continued use. Acne can also look worse for the first few weeks, which is often called skin purging. Skin becomes more prone to sunburn, so daily sunscreen and a hat matter.
| Effect | How common | What to do |
|---|---|---|
| Dryness, peeling, redness | Very common early on | Use less often, moisturize more, never use more than a pea-sized amount |
| Early acne flare | Common in weeks 1 to 4 | Keep going unless severe; review at 8 to 12 weeks |
| Sun sensitivity | Common | Daily SPF, hat, avoid tanning beds |
| Blistering, crusting, severe swelling | Uncommon | Stop and contact your prescriber |
| Allergic reaction | Rare | Seek urgent care for face, tongue or throat swelling or trouble breathing |
Who should avoid it
Who should not use tretinoin?
- Anyone pregnant, trying to conceive or breastfeeding, unless a doctor explicitly approves. DermNet notes retinoids can harm an unborn baby and advises effective contraception for those who could become pregnant.
- People allergic to retinoids, including isotretinoin.
- Skin that is sunburned, windburned, broken or affected by eczema, which tretinoin can worsen.
- Large areas such as the back or chest, which DermNet says tretinoin is not suited to.
- Anyone about to have waxing, peels or laser treatment, unless the clinician knows and agrees.
If you need a pregnancy-friendly alternative for acne or pigment, azelaic acid is one option to discuss with your clinician; see skincare during pregnancy.
Safety and professional-help boundaries
When tretinoin needs a doctor’s input.
- Tretinoin is a prescription medicine in the US; use the strength and schedule your prescriber chose, and do not share it.
- Stop and contact your prescriber for blistering, crusting, severe burning, swelling or skin discoloration.
- Get urgent help for signs of an allergic reaction such as swelling of the face, tongue or throat or trouble breathing.
- Avoid tretinoin if you are pregnant or trying to conceive; retinoids are on the avoid list in our pregnancy guide.
- If acne has not improved after 8 to 12 weeks, or is deep and scarring, ask your dermatologist about other or additional treatment.
Frequently asked questions
Short answers to common questions
What is tretinoin used for?
Tretinoin is a prescription retinoid used mainly to treat acne and to improve fine wrinkles, rough texture and blotchy pigment caused by sun damage. Dermatologists also use it in combination creams for melasma.
Is tretinoin the same as retinol?
No. Both are vitamin A derivatives, but retinol must be converted in the skin into retinoic acid, while tretinoin is retinoic acid itself. That makes tretinoin stronger and more irritating, and it needs a prescription in the US.
What strength of tretinoin should I start with?
Many prescribers start with 0.025% cream or a 0.01% gel, especially for sensitive or dry skin. Your prescriber will choose based on your skin and goal.
Does tretinoin really reduce wrinkles?
Yes, for sun-related wrinkles. A 2025 meta-analysis of eight randomized trials found tretinoin improved both fine and coarse wrinkles compared with a placebo cream, though results take months.
How long does tretinoin take to work?
For acne, some changes appear in 2 to 3 weeks, with clear benefit often after 6 to 12 weeks. For wrinkles and sun damage, expect six months or more.
Can you use tretinoin with vitamin C?
Usually yes. Keep vitamin C in the morning and tretinoin at night, and pause vitamin C if your skin stings.
Can I use tretinoin with benzoyl peroxide?
Only if your prescriber plans it. Applied at the same time, benzoyl peroxide can be very irritating and may make tretinoin less effective, so they are often used at different times of day.
Is tretinoin safe in pregnancy?
No, it should be avoided during pregnancy and when trying to conceive unless your doctor specifically says otherwise. Retinoids can harm an unborn baby.
Is tretinoin good for sensitive skin?
It can be used on sensitive skin, but slowly. A low-strength cream, a few nights a week and generous moisturizer help; if your skin stays raw, ask about adapalene or azelaic acid instead.
Can tretinoin be used around the eyes?
Keep it off the eyelids and away from the eyes, nostril corners and lips. Ask your prescriber before using it on the outer eye area.
Editorial Record
- Editorial status
- awaiting expert review
Related pages
Continue from here
Sources reviewed
Evidence behind this page
- Retin-A (tretinoin) cream, gel and liquid prescribing information, via Drugs.com.
- DermNet: Topical retinoids.
- Huang HY, Lee LTJ. Tretinoin for photodamaged facial skin: systematic review and meta-analysis of randomized controlled trials. Dermatology Practical and Conceptual, 2025.
- Kaiser Permanente Drug Encyclopedia: Tretinoin 0.025% topical cream.
- DermNet: Melasma.
Sources support the general editorial guidance shown here. They do not replace personal medical advice from a qualified clinician.