Topic
Tretinoin
Tretinoin is the prescription retinoid dermatologists have trusted for decades, and also the one that can leave you flaky and questioning your choices for a month. Here is what it actually does for acne, fine lines, and dark spots, how it differs from retinol and adapalene, how to start without wrecking your skin barrier, and what the evidence says when the claims get bigger.
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Tretinoin FAQ
Is tretinoin the same as retinol?
No. Tretinoin is retinoic acid, the form your skin cells respond to directly. Retinol has to be converted into it first, so it is usually gentler and slower. In the US, tretinoin requires a prescription, while retinol is sold over the counter in drugstores.
What strength of tretinoin should I start with?
Prescribers commonly start people on the lowest strength, often 0.025%, a few nights a week, then adjust based on how your skin handles it. Starting low is about limiting irritation so you can stick with it. Your prescriber should pick based on your skin and goals.
How long does tretinoin take to work?
Longer than you want. Expect irritation, flaking, or even extra breakouts early on, with visible acne improvement commonly taking around 12 weeks. Changes in fine lines and texture take longer, often many months. Judging it at three weeks is a great way to quit right before it helps.
Can you use tretinoin during pregnancy?
Clinicians generally advise against it. Very little topical tretinoin is absorbed, but oral retinoids are known to cause birth defects, so doctors play it safe. Tell your prescriber if you are pregnant, trying, or breastfeeding, and ask about alternatives rather than guessing.
Why is tretinoin prescription only?
In the US it is regulated as a prescription drug. It is more potent and more irritating than over-the-counter retinoids, and a clinician should screen for things like pregnancy first. The upside is that telehealth services can prescribe it, so you do not always need an in-person dermatology visit.