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Azelaic Acid and Tretinoin for Acne: Uses and Cautions
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Niacinamide Brings Early Research of Its Own
Niacinamide, a form of vitamin B3, is a familiar skincare ingredient with early acne research behind it. In a 1995 trial of 76 people with red, swollen pimples, 82% of those using a 4% niacinamide (also called nicotinamide) gel improved after 8 weeks, compared with 68% using 1% clindamycin gel, a prescription acne antibiotic. The researchers did not find a meaningful statistical difference between the two (7).
Niacinamide has also been studied for the skin barrier, the protective outer layer that keeps moisture in. Lab and skin studies found that niacinamide helped skin make more ceramides, the natural fats that hold skin cells together, and helped dry skin hold onto water (8). Because tretinoin can leave skin feeling dry, that barrier research is worth knowing about, although it has not been measured in this specific formula. A separate niacinamide and tretinoin cream pairs tretinoin with hyaluronic acid instead of azelaic acid.
Applying More Tretinoin Doesn't Work Faster
This cream is made in more than one tretinoin strength. Having several strengths doesn't mean everyone should work up to the highest one, and a provider decides which one, if any, suits your skin.
Getting the strength right helps, because a routine your skin tolerates is a routine that is easier to stick with. Tretinoin labels warn that applying more than directed does not produce faster or better results, and that using too much can cause significant redness, peeling, or discomfort (1). Some people with sensitive skin become very red, swollen, blistered, or crusted, and a reaction like that is a reason to contact your prescriber (1).
Your Skin Adjusts During the First Few Weeks
Many people who start tretinoin go through an adjustment period, sometimes called retinization or, more casually, the tretinoin purge, before the skin settles. MedlinePlus notes that acne may look worse during the first 7 to 10 days, with red, scaling skin and more acne sores (12). Mayo Clinic describes the skin as more prone to dryness, irritation, and sunburn, especially during the first 2 or 3 weeks (11).
Because both sources describe this early phase, knowing it may happen can make the first weeks easier to plan for. Patience is part of the plan, because Mayo Clinic notes that it can take longer than 12 weeks to see the full effect, even with daily use (11). If irritation becomes severe, or the acne has not improved after 8 to 12 weeks, check in with your provider, who can review the plan with you (11).
Check your eligibility to see whether a prescription skincare treatment through Mochi Health is a fit for you.
Sun Protection Is Part of the Treatment
Tretinoin makes skin more sensitive to sunlight, and the tretinoin cream labels all address it. They advise limiting time in the sun and avoiding sunlamps, using sunscreen and protective clothing when exposure can't be avoided, and not applying the cream to sunburned skin (1). The Retin-A Micro label specifies a sunscreen of SPF 15 or higher (2).
Weather counts as well, since the labels note that wind and cold can also irritate skin being treated with tretinoin (1).
Azelaic Acid Has Been Studied for Dark Marks and Redness
Acne often leaves something behind after the spot clears: a flat brown or red mark that can linger long after the pimple is gone. Azelaic acid has trial evidence on those marks. In a 2024 trial of 72 people with mild to moderate acne, 15% azelaic acid gel used twice daily for 12 weeks improved both red and brown post-acne marks compared with a placebo gel (10).
Redness is the other reason azelaic acid shows up in skincare. The 15% gel is FDA approved for the bumps and pimples of mild to moderate rosacea, a common condition that causes facial redness (4). Both results come from the approved strengths rather than the strength in this cream. For dark patches that aren't caused by acne, what melasma is covers a different set of treatments, and tranexamic acid for rosacea looks at another redness option.
Who Should Check With a Provider
Pregnancy is the most important topic to raise before starting tretinoin, and the labels vary in their guidance. Some FDA-approved tretinoin cream labels state that the cream should not be used during pregnancy. Others say to use it only if the possible benefit outweighs the possible risk to the baby (1). The Retin-A Micro label notes that studies following people who used tretinoin on their skin during pregnancy have not linked it with major birth defects, although those studies were small and had other limits (2).
Because of that uncertainty, tell your provider if you are pregnant, trying to conceive, or breastfeeding before starting. This compounded cream has no label of its own, so your prescriber decides whether it is appropriate for you. Other reasons for caution on the labels include the following.
Allergy: a known allergy to azelaic acid or any other ingredient in the cream (3).
Asthma: worsening of asthma has been reported with azelaic acid products (3,4).
Darker skin tones: azelaic acid labels note rare reports of skin lightening and advise providers to keep an eye on patients with darker skin (3,4).
A Strong Skin Reaction Is a Reason to Call Your Provider
Mild dryness and flaking are common early on, according to Mayo Clinic, though some reactions need a prescriber's input (11). Contact your provider promptly for blistering, crusting, swelling, or redness that keeps getting worse. The tretinoin labels describe these as signs that your skin is reacting too strongly (1). Seek care the same day for wheezing or any trouble breathing, especially if you have asthma, since azelaic acid products have been linked to asthma worsening (3).
Ask your prescriber whether to continue the cream rather than deciding on your own, because the right next step depends on what the reaction looks like.
Steps to Take Before Your First Application
These steps won't replace a visit with a provider, although they will make that visit more useful.
List every product in your current routine, including cleansers, toners, and spot treatments, because tretinoin labels advise caution with strongly drying products (1).
Note whether you are pregnant, planning a pregnancy, or breastfeeding, since that shapes whether tretinoin is an option at all.
Write down how your skin has reacted to past acne treatments, so a provider can weigh which strength fits.
Choose a broad-spectrum sunscreen (one that protects against both UVA and UVB rays) of SPF 15 or higher that you will actually wear every morning (2).
Plan to use a mild, non-medicated cleanser and follow the application directions on your prescription label. Tretinoin labels describe waiting 20 to 30 minutes after washing (1).
The Bottom Line
Putting three skincare ingredients in one tube keeps your routine simple: one step instead of several. Your pregnancy plans and how your skin tends to react are the main things to talk through with a provider. Spironolactone for acne covers a hormonal option, and Mochi skincare lists other creams and gels. Check your eligibility to see whether treatment through Mochi Health fits.
FAQs
Can Tretinoin and Azelaic Acid Be Used Together?
Providers can prescribe tretinoin and azelaic acid together because tretinoin works on clogged pores, while azelaic acid targets acne bacteria and inflammation (1,3). Whether the combination suits your skin is a question for a provider.
Should I Use Tretinoin or Azelaic Acid First?
Whether you use tretinoin or azelaic acid first doesn't come up with a combination cream, because both go on in a single step. When the two are prescribed as separate products, follow your prescriber's order and timing, since that plan accounts for how your skin tolerates each one.
What Should You Never Mix With Azelaic Acid?
What you should never mix with azelaic acid depends on the rest of your routine, so ask your provider before adding other active products. Alongside tretinoin, the tretinoin labels advise caution with medicated or gritty, scrubbing soaps, strongly drying cosmetics, and products high in alcohol, astringents, spices, or lime (1).
Do You Apply Azelaic Acid Before or After Retinol?
You apply azelaic acid before or after retinol according to your provider's plan. Retinol is an over-the-counter relative of tretinoin, and the tretinoin labels advise caution with other topical products used alongside it, so mention any retinol product at your visit (1).
References
Tretinoin Cream USP, prescribing information (generic tretinoin cream labels). DailyMed, National Library of Medicine. tretinoin cream label
Retin-A Micro (tretinoin gel) microsphere, prescribing information. DailyMed, National Library of Medicine. dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=08ab7e0c-1437-455f-815c-98904d96a289
Azelex (azelaic acid cream) 20%, prescribing information. US Food and Drug Administration, 2024. Azelex prescribing information
Finacea (azelaic acid) Gel, 15%, prescribing information. US Food and Drug Administration, 2020. accessdata.fda.gov/drugsatfda_docs/label/2020/021470s015s016lbl.pdf
Katsambas A, et al. Clinical studies of 20% azelaic acid cream in the treatment of acne vulgaris: comparison with vehicle and topical tretinoin. Acta Dermato-Venereologica Supplementum, 1989. Two clinical trials. pubmed.ncbi.nlm.nih.gov/2528257/
Webster G. Combination azelaic acid therapy for acne vulgaris. Journal of the American Academy of Dermatology, 2000. A review. pubmed.ncbi.nlm.nih.gov/10898830/
Shalita AR, et al. Topical nicotinamide compared with clindamycin gel in the treatment of inflammatory acne vulgaris. International Journal of Dermatology, 1995. A randomized trial. nicotinamide acne trial
Tanno O, et al. Nicotinamide increases biosynthesis of ceramides as well as other stratum corneum lipids to improve the epidermal permeability barrier. British Journal of Dermatology, 2000. Laboratory and skin study. pubmed.ncbi.nlm.nih.gov/10971324/
Sauer, et al. The multiple uses of azelaic acid in dermatology: mechanism of action, preparations, and potential therapeutic applications. Postępy Dermatologii i Alergologii, 2023. A review. pmc.ncbi.nlm.nih.gov/articles/PMC10809820/
Shucheng H, et al. Effects of 15% azelaic acid gel in the management of post-inflammatory erythema and post-inflammatory hyperpigmentation in acne vulgaris. Dermatology and Therapy, 2024. A randomized, placebo-controlled trial. pubmed.ncbi.nlm.nih.gov/38734843/
Mayo Clinic. Tretinoin (topical route): description and precautions. mayoclinic.org/drugs-supplements/tretinoin-topical-route/description/drg-20066521
MedlinePlus. Tretinoin Topical: MedlinePlus Drug Information. medlineplus.gov/druginfo/meds/a682437.html
This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before starting, stopping, or changing any medication or treatment plan. Tretinoin, azelaic acid, and niacinamide cream requires a written prescription from a licensed provider. Speak with a provider to determine if tretinoin, azelaic acid, and niacinamide cream is appropriate for you. Tretinoin is FDA approved to treat acne at specific strengths, and azelaic acid is FDA approved as a 15% gel for rosacea and a 20% cream for acne, but this compounded combination cream is not FDA approved. Compounded medications are not approved or evaluated by the FDA for safety, effectiveness, or quality. Individual results are not guaranteed and may vary from person to person. All professional medical services are provided by licensed physicians and clinicians affiliated with independently owned and operated professional practices. Mochi Health Corp. provides administrative and technology services to affiliated medical practices it supports, and does not provide any professional medical services itself.
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