Can You Use Tretinoin With Benzoyl Peroxide?

Why this verdict

The concern comes from a 1998 laboratory study. Researchers mixed a standard tretinoin 0.025% gel with a 10% benzoyl peroxide lotion and exposed it to light. About half of the tretinoin had degraded after roughly two hours, and about 95% after 24 hours. Adapalene, tested the same way, stayed stable. Tretinoin is sensitive to both light and oxidation, and benzoyl peroxide is a strong oxidizer.

That does not mean the two treatments work against each other. The 2024 American Academy of Dermatology (AAD) acne guideline strongly recommends combining a topical retinoid with benzoyl peroxide, because they tackle acne in different ways: the retinoid helps keep pores from clogging, and benzoyl peroxide reduces acne-causing bacteria. The problem is the chemistry of mixing them on the skin, not the treatment plan.

Some formulations get around it. A 2002 study found that tretinoin in a microsphere gel stayed largely intact when combined with an erythromycin–benzoyl peroxide gel under fluorescent light, and a 2010 report found no benzoyl peroxide–induced breakdown with an optimized micronized tretinoin 0.05% gel. In 2021 the FDA approved Twyneo, a prescription cream that holds tretinoin and benzoyl peroxide in separate silica microcapsules so they can be applied together. If you use one of these, follow its label and your prescriber rather than a general rule.

For everyone else, splitting them by time of day is the simple, low-risk approach. It also spreads out irritation, which is the more common reason people give up on this combination.