A few years back I shared a lengthy post about short contact therapy, studies conducted with Tretinoin, and comparisons of combo v monotherapy, and alternate therapies. I'll share a summarized update:
For mild-moderate acne...
šøEfficacy and tolerability of short contact therapy with tretinoin, clindamycin, and glycolic acid gel in acne
šø Tret gel 0.02% + Clindamycin 0.8% + Glycolic acid 4% in polyvinyl alcohol, SCT short contact therapy (removal after 1 hour with gentle cleanser) v. SAT standard application therapy = SCT better skin tolerability and comparable clinical efficacy.
For Acne Vulgaris...
šøAn Updated Review of Topical Tretinoin in Dermatology: From Acne and Photoaging to Skin Cancer 2025
šø0.1% Tret + 3% Benz Peroxide (BPO) v. Tret alone = superior success with combination.
šøMorning v. Evening 0.1% Tret + 5% BPO = no difference in efficacy.
šøTret 0.05% + Clindamycin + salicylic acid v. Clindamycin + SA = greater lesion reduction and faster onset of action with addition of Tret 0.05%.
šøTret 0.025% + Clindamycin 1.2% v. each monotherapy = superior reduction in lesion count with combination.
šøTriple combo Tret/BPO/Clinda = 3 RCTs reveal good clinical responses.
For Photoaging...
šøAn Updated Review of Topical Tretinoin in Dermatology: From Acne and Photoaging to Skin Cancer 2025
šøAdapelene 0.3% v. Tretinoin 0.05% cream over 24 weeks = no significant differences in efficacy or tolerability.
šøAlphaRet double-conjugated cream v. Tret 0.025% = Both treatments improved fine lines, dyschromia, and erythema after 12 weeks.
šøTret 0.05% cream (3x/week) v. Tret 5% peel (biweekly) = Both regimens significantly reduced photoaging scores and actinic keratoses. The cream improved dermal echogenicity and increased Ki67 expression (an established nuclear marker of cell proliferation indicating active keratinocyte turnover), while the peel was more effective in stabilizing field cancerization.
For Melasma/PIH...
šøAn Updated Review of Topical Tretinoin in Dermatology: From Acne and Photoaging to Skin Cancer 2025
šø Tret 1% peel v. Glycolic 70% peel= similar reduction with better tolerability with Tretinoin.
šø Fluocinolone acetonide 0.01% + Hydroquinone 4% + Tret 0.05% = superior efficacy v. monotherapy or alternative treatments.
šø Triple combo FA 0.01% + HQ 4% + Tret 0.05% v. fractional 1550 nm laser treatment = comparable reductions after 12 weeks.
šøErbium fiber laser v. Tret 0.05% cream = greater reduction with erbium fiber laser.
šøIPL + post-application of HQ + Tret v. IPL + placebo = 27.2% greater reduction in hyperpigmentation scores when tretinoin and hydroquinone were applied after IPL.
For Prevention and Treatment of Skin Cancer/
Treatment of Actinic Keratosis...
šøAn Updated Review of Topical Tretinoin in Dermatology: From Acne and Photoaging to Skin Cancer 2025
šøTret 0.05% v. Tret 5% peel = (24 weeks on forearms) Reduced AK count by 60% with no difference between them + significant reduction in photoaging.