Can you use azelaic acid with niacinamide?

Yes. Azelaic acid and niacinamide can be used in the same routine. The FDA labels for azelaic acid list no interaction with niacinamide, and each ingredient has its own evidence for acne-prone skin and dark marks. No published trial has tested the two together, so the pairing is based on what is known about each one. This guide explains what each ingredient does, where they overlap, and how to add them without irritating your skin. For the ingredient itself, see what azelaic acid is.

The short answer

Question	Answer
Can they be combined?	Yes. No label or guideline Skinli read forbids it
Has the pair been tested?	No published trial Skinli found. A prescription cream with azelaic acid 15% and niacinamide 4% is listed on DailyMed
Which goes on first?	No rule. The azelaic acid labels say cosmetics go on after it dries
Main caution	Azelaic acid often stings at first. Add one product at a time
Where they overlap	Acne-prone skin and dark marks
Where they differ	Azelaic acid is an approved acne and rosacea medicine; niacinamide reached dermatologist agreement for redness

What each ingredient does

Azelaic acid is an acid found in whole grains and animal foods and made by the body, according to its FDA label. The FDA approved it at 20% as a cream for mild to moderate acne, and at 15% as a gel and foam for the red bumps of rosacea. The American Academy of Dermatology (AAD) says it "opens clogged pores and helps keep them open, works on the bacteria that cause acne, and reduces inflammation due to acne," and that it "can also treat the dark spots that appear when acne clears."

Niacinamide is a form of vitamin B3. A 2026 review in Skin Health and Disease says it "is thought to improve symptoms of acne vulgaris with its anti-inflammatory and anti bacterial profile, and its ability to reduce sebum production." Sebum is skin oil. The same review describes a trial of 60 people in which niacinamide 5% gel and clindamycin 2% gel, an antibiotic gel, reduced acne to a similar degree over 8 weeks. Skinli's guide to what niacinamide does covers the ingredient in full.

The strength of evidence differs. A 2020 Cochrane review, which pools trials and grades how far the results can be trusted, found azelaic acid probably works as well as tretinoin for acne, based on moderate-quality evidence. For niacinamide, it found four trials against antibiotics, and none measured the patients' own rating of overall improvement. The 2024 AAD acne guideline gives azelaic acid a conditional recommendation.

Where they overlap and where they differ

A 2025 study in the Journal of the American Academy of Dermatology asked 62 dermatologists at 43 centers to vote on skin care ingredients. They agreed on:

• Azelaic acid for acne and dark spots.
• Niacinamide for redness and dark spots.

So both reached agreement for dark spots. A 2010 review of dark marks after inflammation lists azelaic acid among ingredients that "can effectively lighten areas of hypermelanosis," meaning areas of extra pigment, and lists niacinamide among "other depigmenting agents." For more on each, see azelaic acid for dark spots and niacinamide for dark spots.

For redness, the two differ. Azelaic acid is FDA-approved for the red bumps of rosacea, and its gel label says its effect on redness without bumps "has not been evaluated." Niacinamide reached agreement for redness in the 2025 survey. The guide to niacinamide for sensitive skin and redness covers that use. Persistent facial redness can be rosacea, which needs a doctor's diagnosis.

Has anyone combined them?

Two things show the pair is in use, with no trial results behind it:

• A prescription cream. DailyMed, the U.S. National Library of Medicine's database of drug labels, lists a cream containing azelaic acid 15% and niacinamide 4% in one tube, filed as a prescription product in the "unapproved drug other" category. That category means it is sold without FDA approval.
• Store products. DailyMed also lists nonprescription acne products that contain both ingredients alongside others.

The 2026 review describes niacinamide used in skin care routines alongside prescription acne treatments such as adapalene with benzoyl peroxide, where it improved how well people tolerated them. That was a different pairing.

How to use them together

The sources give no set order, so these steps come from the azelaic acid labels and general care:

1. Start one first. Use one product alone for a few weeks, then add the other. If your skin reacts, you will know which one caused it.
2. Patch test the new one. The guide to patch testing explains how.
3. Apply azelaic acid to clean, dry skin. The labels say to wash with a mild soap or soapless cleanser and pat dry first.
4. Let it dry before the next layer. The 15% gel label says "cosmetics may be applied after the application of azelaic acid gel has dried." A niacinamide serum or moisturizer can go on after that.
5. Avoid harsh additions. The labels ask you to avoid "alcoholic cleansers, tinctures and astringents, abrasives and peeling agents." Check that your niacinamide product has none of these.
6. Wear sunscreen in the morning. Skinli's plan uses sunscreen every day, because sun can darken acne marks.

Skinli's 12-week plan puts azelaic acid 10% cream on in the morning, after moisturizer and before sunscreen, from week 5, for people with flat marks. The plan does not add niacinamide. If you already use a niacinamide moisturizer, it can stay as your moisturizer step.

A sample routine

This is one way to fit both into a day, based on Skinli's 12-week plan for people with flat acne marks. The plan itself uses a plain moisturizer. If yours contains niacinamide, it fills the same step.

Time	Steps
Morning	Gentle cleanser, moisturizer (with niacinamide if you use one), azelaic acid 10% cream from week 5, sunscreen
Night	Gentle cleanser, the acne gels (adapalene 0.1% and benzoyl peroxide 2.5%), moisturizer

Putting azelaic acid in the morning keeps it apart from the night-time retinoid. The free Skinli acne plan builds this routine from a photo and tells you when a doctor is the better next step.

Oily skin

Both ingredients have been studied for oil. The 2026 review describes niacinamide's "ability to reduce sebum production." A 2024 review in Clinical, Cosmetic and Investigational Dermatology says azelaic acid "can inhibit sebum secretion, although its exact mechanism remains unclear," and describes a study in which azelaic acid peels reduced oil in people with acne. The 2025 dermatologist survey agreed on other ingredients for oily skin, including benzoyl peroxide, retinoids and salicylic acid. If oil is your main concern, those have more support.

If you have rosacea

Rosacea skin reacts easily, so combining products needs more care. The azelaic acid 15% gel and foam are FDA-approved for the bumps of rosacea, and MedlinePlus says people using azelaic acid should avoid peeling agents "especially if you have rosacea." The American Academy of Dermatology says a rosacea plan includes "a gentle cleanser, moisturizer, and sunscreen," and the azelaic acid for rosacea guide covers it. Ask your dermatologist before adding niacinamide to a prescription rosacea treatment.

Irritation and early reactions

Azelaic acid often stings at first. The 15% gel label reports burning, stinging or tingling in 29% of trial users with rosacea, and itching in 11%, usually in the first few weeks. The 2026 review lists "mild itching, burning, mild dermatitis and greasy skin" as niacinamide side effects in trials.

The sources Skinli read describe no early acne flare for either ingredient. The purging guide explains what the labels report in the first weeks. If you use a retinoid too, read azelaic acid with tretinoin, and for other pairs see which skincare ingredients can you mix.

During pregnancy

The American Academy of Dermatology says azelaic acid "is thought to be safe to use during pregnancy." The pregnancy guide sets out what the labels say, and Skinli's guide to niacinamide during pregnancy covers the other half. Ask your doctor or pharmacist before starting either while pregnant.

When to ask a doctor

Ask a doctor or pharmacist before combining these with a prescription product, if you have rosacea, or if you are pregnant or breastfeeding. Stop and get advice if stinging is severe or lasts past the first weeks, if you notice light patches, or if your face swells. A pharmacist can also read the ingredient list of a store product with you and point out alcohol, fragrance or peeling acids. Skinli gives general education. A doctor is the right person to diagnose and treat your skin.