Every researched pairing from the TipsForAcne “Can I use these together?” checker as one table: 26 combinations of 22 ingredients, each with a verdict, the reason in plain words, how to use the two together if you can, and the study, label or guideline it rests on.
3 of 26
pairings need to be kept apart on the evidence; 10 are fine together, and most “don’t mix” rules turn out to be caveats rather than bans.
Quick facts
- What it is: Two-ingredient acne pairings with an evidence-based verdict and sources
- Records: 26 pairings, 22 ingredients
- Verdicts: 10 “Fine together”, 6 “Fine, with a caveat”, 5 “Nobody has tested this”, 3 “Keep them apart”, 2 “Ask your prescriber first”
- Sources: FDA drug labels (DailyMed), the AAD 2024 acne guideline, and the stability or clinical study cited on each row
- Formats: CSV, JSON
- License: CC BY 4.0, attribute TipsForAcne
- Checked: September 24, 2026
All 26 pairings
| Pairing | Verdict | In short | How to use them | Sources |
|---|---|---|---|---|
| Adapalene (Differin) + Benzoyl peroxide | Fine together | Fine together: there are FDA-approved products containing both. | Layer them, or use a combination product. The thing to watch is irritation, not chemistry: this pairing is more drying than either alone. | Martin B et al. Br J Dermatol 1998; DailyMed: Epiduo (adapalene 0.1%/benzoyl peroxide 2.5%) gel label |
| Adapalene (Differin) + Salicylic acid (BHA) | Fine, with a caveat | No chemical problem. It is a question of cumulative irritation. | Alternate nights, or acid in the morning and adapalene at night. Add one thing at a time so you know what caused what. | AAD 2024 acne guideline (Reynolds RV et al.); Cochrane 2020: azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and AHA for acne |
| Azelaic acid + Benzoyl peroxide | Nobody has tested this | No combination trial exists. There is no mechanistic red flag. | If you use both, watch for irritation and introduce them one at a time. There is no evidence to promise you a benefit from combining them. | Cochrane 2020 (Liu H et al.) |
| Azelaic acid + Niacinamide | Fine together | No evidence of any interaction, and no trial of the pair either. | Use them together in either order. | Cochrane 2020 (Liu H et al.); King S et al. J Cosmet Dermatol 2023 |
| Azelaic acid + Tretinoin (prescription retinoid) | Fine together | No interaction known, and no trial of the combination either. | Layer them, or alternate. Azelaic acid is among the better-tolerated actives, so this is usually a comfortable pairing, and azelaic acid also works on the dark marks retinoids leave behind. | Cochrane 2020 (Liu H et al.); King S et al. Systematic review of azelaic acid, J Cosmet Dermatol 2023 |
| Benzoyl peroxide + Clascoterone (Winlevi) | Nobody has tested this | No combination trial, but the guideline’s whole logic points toward combining. | Reasonable to combine. Introduce one at a time so you know which is doing what, and which is causing any irritation. | AAD 2024 acne guideline (Reynolds RV et al.) |
| Benzoyl peroxide + Hydroquinone | Keep them apart | Separate them: this is one of the few ‘don’t mix’ rules with real support. | Different times of day, or different days. Be aware we found no trial or case series quantifying this specific staining; it is a well-recognised clinical caution with a clear mechanism rather than a measured effect, and the discoloration is described as temporary. | DermNet: hydroquinone; Benzoyl peroxide, StatPearls |
| Benzoyl peroxide + Moisturiser or sunscreen | Fine together | Use the moisturiser and the sunscreen. They do not blunt the treatment. | The genuinely true piece of benzoyl peroxide folklore is the laundry one: it bleaches hair and coloured fabric. White pillowcases and towels, and let it dry before you dress. | Kim MR, Kerrouche N. J Dermatolog Treat 2018; DailyMed: Epiduo gel label |
| Benzoyl peroxide + Niacinamide | Fine together | Fine together, and a randomised trial suggests the combination is better. | Layer them in either order. No need to separate by time of day. | Kaewsanit T et al. BP 2.5% + niacinamide 5% vs BP alone, J Clin Aesthet Dermatol 2021 |
| Benzoyl peroxide + Physical scrub or cleansing brush | Keep them apart | Skip the scrub. This one is expert consensus rather than trial data, and we will say so. | The mechanism (barrier disruption compounding the disruption the active already causes) is sound, and the upside of a scrub over a chemical exfoliant is close to nil, so the risk-benefit is clear even without a trial. | AAD: how to safely exfoliate at home; AAD 2024 acne guideline (Reynolds RV et al.) |
| Benzoyl peroxide + Salicylic acid (BHA) | Fine together | Fine together, with one regulatory nuance worth understanding. | Use them. Watch for dryness: both are drying, and the combination more so. | Akarsu S et al. Adding salicylic acid to clindamycin and benzoyl peroxide, J Dermatol 2012; Khammari A et al. Salicylic-acid-based dermocosmetic adjunct to benzoyl peroxide, J Drugs Dermatol 2023 |
| Benzoyl peroxide + Sulfur | Nobody has tested this | Barely studied, in either direction. | Both are drying and keratolytic, so additive irritation is the practical concern. There is no evidence promising you extra benefit from stacking them. | Cochrane 2020 (Liu H et al.); Danto JL et al. Benzoyl peroxide and precipitated sulfur cream, Appl Ther 1966 |
| Benzoyl peroxide + Tea tree oil | Nobody has tested this | Untested, and there is a reason to be wary that has nothing to do with efficacy. | There is no evidence of added benefit and a plausible reason for added risk. If you want to try tea tree oil, try it on its own, from a fresh bottle. | Bassett IB et al. Tea-tree oil vs benzoyl peroxide, Med J Aust 1990 |
| Benzoyl peroxide + Tretinoin (prescription retinoid) | Fine, with a caveat | Real chemistry, and it depends entirely on which tretinoin you have. | With plain generic tretinoin cream or gel, use benzoyl peroxide in the morning and tretinoin at night. It costs nothing and removes the question. With microsphere, optimised-vehicle or encapsulated products, there is no stability reason to separate them. | Martin B et al. Chemical stability of adapalene and tretinoin with benzoyl peroxide, Br J Dermatol 1998; Del Rosso JQ et al. Absence of degradation of tretinoin with an optimised gel, J Clin Aesthet Dermatol 2010; DailyMed: Twyneo (tretinoin 0.1%/benzoyl peroxide 3%) cream label |
| Benzoyl peroxide + Vitamin C (L-ascorbic acid) | Nobody has tested this | Nobody has tested this. The chemistry makes separating them a free, sensible hedge. | Vitamin C in the morning, benzoyl peroxide in the evening. It costs nothing and sidesteps a question nobody has answered. | Benzoyl peroxide, StatPearls |
| Combined oral contraceptive + Spironolactone | Fine together | Routinely prescribed together, and the monitoring folklore has been studied. | This is prescription territory, so it is a conversation with your prescriber rather than a decision you make. Monitoring is still appropriate with kidney or heart disease, older age, or other medications that raise potassium, and some contraceptives are themselves mildly potassium-sparing. | AAD 2024 acne guideline (Reynolds RV et al.); Plovanich M et al. Low usefulness of potassium monitoring, JAMA Dermatol 2015 |
| Glycolic or lactic acid (AHA) + Salicylic acid (BHA) | Fine, with a caveat | No chemical interaction at all. This is dose, not incompatibility. | Pick one for most days. If you use both, use them on different days, and stop if skin feels tight, shiny-tender or stings on water. | Cochrane 2020 (Liu H et al.); Garg VK et al. Glycolic acid vs salicylic-mandelic acid peels, Dermatol Surg 2009 |
| Hydroquinone + Tretinoin (prescription retinoid) | Ask your prescriber first | An established combination, but the classic version is a prescription with a steroid in it. | This is clinician territory, not a routine you assemble yourself; the steroid component makes it short-term and supervised, and prolonged hydroquinone carries a risk of exogenous ochronosis, a blue-black darkening that should prompt stopping. | Kligman AM, Willis I. A new formula for depigmenting human skin, Arch Dermatol 1975; Bulengo-Ransby SM et al. Tretinoin for post-inflammatory hyperpigmentation, N Engl J Med 1993; Alghamdi SM et al. Kligman’s formula meta-analysis, Arch Dermatol Res 2025 |
| Niacinamide + Tretinoin (prescription retinoid) | Fine, with a caveat | Reasonable, but the specific claim is thinner than it sounds. | Fine to use together, and plausibly helpful. Just be aware the honest version of the claim is ‘barrier-supporting moisturisers containing niacinamide improve tolerability of topical acne treatment’, not ‘niacinamide cancels retinoid irritation’. | Tempark T et al. Ceramide and niacinamide moisturiser with topical anti-acne treatment, J Cosmet Dermatol 2024 |
| Niacinamide + Vitamin C (L-ascorbic acid) | Fine together | Fine together; the incompatibility comes from 1960s solution chemistry, not from skin. | Use them in the same routine if you like. If a vitamin C serum turns yellow-brown, that is the ascorbic acid oxidising on its own, which it does regardless of what else is on your face. | Guttman DE. Solution phase interaction of nicotinamide with ascorbic acid, J Pharm Sci 1963; Barbosa M et al. Nicotinamide 10% with magnesium ascorbyl phosphate vs hydroquinone, Clin Cosmet Investig Dermatol 2024 |
| Oral doxycycline + Oral isotretinoin | Ask your prescriber first | A labelled interaction. This is a prescriber’s call, not yours. | If you have been prescribed both, raise it with the prescriber before taking them. It may be an oversight, or there may be a plan. Note this warning is about oral isotretinoin. Oral doxycycline with a *topical* retinoid is standard combination therapy with no such interaction. | DailyMed: Accutane (isotretinoin) label; DailyMed: doxycycline hyclate label |
| Oral isotretinoin + Waxing, dermabrasion or laser resurfacing | Keep them apart | A labelled caution, not folklore. Wait six months. | Threading, shaving or trimming instead. Tell any clinic doing laser, peels, dermabrasion or microneedling that you have taken isotretinoin and when you stopped. | DailyMed: Accutane (isotretinoin) label |
| Salicylic acid (BHA) + Tretinoin (prescription retinoid) | Fine, with a caveat | No chemical problem. This is purely a question of how much irritation your skin will take. | Stagger them: different nights, or acid in the morning and retinoid at night, and build up. If your skin stings, flakes or goes red, that is dose, not incompatibility. | AAD 2024 acne guideline (Reynolds RV et al.); Bertolani MB et al. Short contact tretinoin, clindamycin and glycolic acid gel, Dermatol Ther 2021 |
| Topical antibiotic (clindamycin, erythromycin) + Benzoyl peroxide | Fine together | Not just fine: this is the pairing guidelines actively want you to use. | Use them together, always. If your prescription is an antibiotic alone, that is worth asking your prescriber about. | AAD 2024 acne guideline (Reynolds RV et al.); Ghannoum M et al. Clin Cosmet Investig Dermatol 2025 |
| Topical antibiotic (clindamycin, erythromycin) + Tretinoin (prescription retinoid) | Fine together | Fine together: approved products contain both in one tube. | Two label points worth carrying over: products containing clindamycin should not be combined with erythromycin-containing products, and because these combinations contain no benzoyl peroxide, the guideline recommends using benzoyl peroxide somewhere in the regimen anyway to limit resistance. | AAD 2024 acne guideline (Reynolds RV et al.); DailyMed: Ziana (clindamycin/tretinoin) gel label |
| Tretinoin (prescription retinoid) + Vitamin C (L-ascorbic acid) | Fine, with a caveat | No evidence of harm. The pH argument is about one bottle, not two products. | Vitamin C in the morning, retinoid at night is the conventional split and is perfectly reasonable. The real reason to separate is additive irritation, especially with L-ascorbic acid at 15–20%. | Seité S et al. Histological evaluation of a topical retinol-vitamin C combination, Skin Pharmacol Physiol 2005 |
How we built this
For each pairing we looked for a primary source that actually tests the two together: a formulation stability study, a clinical trial of the combination, an FDA label interaction section, or a guideline statement. The verdict follows that source; where nothing has been tested the verdict says so (“Nobody has tested this”) instead of guessing. The “myth” field records the widely repeated rule the evidence does not support, where there is one.
What this cannot tell you
It covers pairs only, not full routines, and it cannot account for your skin, your prescription strength or your other medicines. “Ask your prescriber first” is a verdict, not a loophole. General information, not medical advice.
Use this data
The facts in this table (what a guideline recommends, what a label says, what a study found) are not ours to own; repeat them anywhere. Our wording, table and layout are free to reuse, including commercially, under CC BY 4.0. Attribution with a link is all we ask.
Download CSV of the Acne Ingredient Pairings: Can I Use These Together? dataset · Live JSON: /data/acne-ingredient-pairings.json for the Acne Ingredient Pairings: Can I Use These Together? dataset (stable URL, CORS open; the same records are embedded in this page as tfa-ds-pairings-json) · All TipsForAcne datasets
Cite as: TipsForAcne, “Acne Ingredient Pairings Dataset: 26 Combinations, Checked Against the Evidence”, tipsforacne.com/data/acne-ingredient-pairings/ (checked 2026-09-24). General information, not medical advice.