What it is
Azelaic acid is a dicarboxylic acid produced naturally by yeast on skin. In dermatology it's used at prescription strengths of 15%–20% for rosacea and acne. OTC formulas typically sit around 10%.
What it does
- Anti-inflammatory — calms papulopustular rosacea.
- Antimicrobial against acne-causing bacteria.
- Normalizes keratinization in follicles (anti-comedonal).
- Inhibits tyrosinase — fades post-inflammatory pigmentation and melasma.
Evidence strength
Strong for inflammatory rosacea, mild-to-moderate acne, and post-inflammatory hyperpigmentation, including in melasma protocols.
Best for
- Hormonal/adult acne, especially around the jaw and chin.
- Rosacea — papules, redness, sensitivity.
- Hyperpigmentation, especially in deeper skin tones where hydroquinone alternatives are needed.
- Pregnancy-safe option for users who can't use retinoids.
Who should avoid it
- Anyone who's had a documented reaction to it (rare).
- People who can't tolerate the gritty texture some formulas have — switch to a gel.
Ideal concentration range
| OTC | 10% — Ordinary, Naturium, several mid-tier brands. |
|---|---|
| Prescription | 15% gel (Finacea) or 20% cream (Azelex). |
Best ingredient pairings
- Niacinamide — both calm inflammation; safe daily layering.
- Vitamin C — complementary on pigmentation.
- Sunscreen — non-negotiable for pigmentation work.
- Retinoids (PM) — used together by dermatologists for stubborn acne.
Ingredients to avoid combining
- Strong physical scrubs in the same session — pointless and irritating.
- Multiple AHAs at the same time — pick a lane.
Pregnancy considerations
Azelaic acid is considered safe in pregnancy and breastfeeding, including the 15%–20% prescription strengths in many guidelines. Always confirm with your obstetrician.
Irritation potential
Low. Brief tingling on first use is common, especially with 15%–20% strengths. Resolves within a week for most.
Beginner guidance
- 10% serum or cream after cleansing, before moisturizer.
- Once daily for a week, then twice daily if tolerated.
- Allow 8–12 weeks for visible pigmentation/acne changes.
Advanced guidance
- Layer under tretinoin for stubborn adult acne (per dermatologist).
- Use as the daytime anchor with vitamin C; tretinoin or other retinoid at night.
- For melasma, pair with tranexamic acid + tinted mineral SPF.
Best products containing it
The Ordinary Azelaic Acid Suspension 10%
Drugstore · ~$11
Cheapest entry. Slight pilling potential; smooth into skin slowly.
View at retailerNaturium Azelaic Topical Acid 10%
Drugstore · ~$23
Smoother base; pairs nicely with their niacinamide.
View at retailerPrescription — Finacea 15% (Rx)
Rx · varies
The clinical workhorse. Consider a dermatologist consult if OTC plateaus.
Find a dermResearch notes
- Sieber & Hegel, review of azelaic acid mechanisms (2014).
- Multiple RCTs for 15% azelaic acid in papulopustular rosacea.
- Comparable efficacy vs hydroquinone 4% in some melasma trials.