Tretinoin vs adapalene: which works better for acne?

The short answer: adapalene matches tretinoin and is easier on skin

Bottom line: in the trials we reviewed, adapalene 0.1% gel worked about as well as tretinoin and caused less irritation. That pattern shows up across several studies, though the size of the gap varies and the newest head-to-head data are more than two decades old.

Where adapalene pulled ahead, and where it didn't

Bottom line: adapalene's edge is clearest on tolerability and early response. The efficacy gap is small and not uniform across studies.

In the 323-patient multicenter trial, total lesions fell 49% with adapalene and 37% with tretinoin at week 12 (p<0.01). Noninflammatory lesions fell 46% vs 33%, while inflammatory lesions fell 48% vs 38%, which did not reach significance (p=0.06) Shalita multicenter trial.

The Asian cohort did not produce a clear winner. Both drugs cut lesions by roughly 69 to 74 percent, and the authors concluded adapalene is comparably effective and less irritating for mild-to-moderate acne (China comparison).

On tolerability, the Thiboutot trial found adapalene caused less cutaneous irritation and fewer treatment-related adverse events (Thiboutot tolerability RCT).

Irritation and patient preference

Bottom line: if your main worry is redness, scaling or burning, the data lean toward adapalene. Retinoid dermatitis was the main local side effect in the comparative trials, and adapalene produced less of it.

In a split-face study of 100 patients over four weeks, most preferred the adapalene side, and it caused significantly less skin irritation (split-face preference study).

What we don't know yet

Bottom line: the evidence is provisional, and the gaps matter for real decisions.

• Most head-to-head trials used tretinoin 0.025%. The 0.05% cream comparison is a single trial, and its tolerability results were cut off in the abstract we retrieved.
• The meta-analysis includes unpublished studies and dates from 1998, before many newer formulations existed.
• We found no trials addressing pregnancy, photosensitivity, cost or adherence.
• Tretinoin formulations varied across trials, from gel and cream to microsphere, and they may not be interchangeable.
• We did not retrieve current AAD guidance, FDA labeling or a recent systematic review.

How to use this if you're choosing

Bottom line: if you are choosing between these two for acne, the trials point to adapalene 0.1% as a reasonable option when irritation is the problem. Efficacy looks roughly equal, so tolerability is often the deciding factor.

For background on the drug itself, see our tretinoin overview. Talk to a dermatologist before switching, especially if you are pregnant or planning pregnancy, since we found no data on that question.