Azelaic acid
Naturally occurring C9 dicarboxylic acid with a fourfold action: antimicrobial + comedolytic + anti-inflammatory + tyrosinase inhibitor (it lightens hyperpigmentation). FDA-approved for acne (20%) and rosacea (15%). One major advantage: it is safe in pregnancy.
Related comparisons
Tretinoin vs Tazarotene vs Azelaic acidWHAT IS AZELAIC ACID?
Detailed overview
Azelaic acid is a naturally occurring, saturated, nine-carbon dicarboxylic acid (the skin's Malassezia yeast also produces it). Unlike retinoids, it does not act on a receptor but through several parallel pathways: it inhibits the proliferation of Cutibacterium acnes (antimicrobial), normalizes follicular keratinization (comedolytic), neutralizes the reactive oxygen species of neutrophils (anti-inflammatory – this is what gives it its action against rosacea redness), and inhibits the tyrosinase enzyme, thereby lightening hyperpigmentation – acting selectively on hyperactive melanocytes. It is FDA-approved for acne (Azelex/Skinoren 20% cream) and papulopustular rosacea (Finacea 15% gel and foam). In the rosacea study, the 15% gel reduced inflammatory lesions by 51-58% versus 39-40% for the vehicle (PMID 12789172). A key practical advantage: pregnancy category B, meaning that, unlike retinoids, it is one of the first choices during pregnancy and breastfeeding.
ATC code
D10AX03 (anti-acne) / dermatological
Prescription status
Prescription only (Rx) at the 15%/20% concentration; weaker cosmetic versions are OTC
Mechanism of action
Antimicrobial + comedolytic + anti-inflammatory + tyrosinase inhibitor
Strengths
20% cream (acne) · 15% gel / 15% foam (rosacea)
Onset of action
4-8 weeks (acne/rosacea); 8-12+ weeks (pigment marks)
Data console
Lab data
Safety
Side effects, stop signs, contraindications
Side effects · 4
- Mild local irritation (the most common): transient burning/stinging, itching, tingling and erythema after application, mainly in the first 1-2 weeks; typically mild and far gentler than tretinoin/tazarotene, easing over time.
- Skin dryness and scaling: mild dryness and flaking can occur; well managed by pairing with a moisturizer.
- Rare hypopigmentation in darker skin: via tyrosinase inhibition it could in theory lighten, but it acts selectively on hyperactive (abnormal) melanocytes, so depigmentation of normal skin is rare; still worth watching in darker skin.
- Hypersensitivity reaction (rare): contact dermatitis, rash or more severe irritation; discontinue if an allergic reaction occurs.
Contraindications · 2
- Hypersensitivity to azelaic acid/excipient
- Broken skin
Related Hair & Skin
Same therapeutic category
Studies
Related research and clinical findings
Efficacy and safety of azelaic acid (15%) gel as a new treatment for papulopustular rosacea: results from two vehicle-controlled, randomized phase III studies
Thiboutot D, Thieroff-Ekerdt R, Graupe K.
A phase 3 randomized, double-blind, vehicle-controlled trial of azelaic acid foam 15% in the treatment of papulopustular rosacea
Draelos ZD, Elewski BE, Harper JC, et al.
Azelaic acid. A review of its pharmacological properties and therapeutic efficacy in acne and hyperpigmentary skin disorders
Fitton A, Goa KL.
Efficacy and safety of topical azelaic acid (20 percent cream): an overview of results from European clinical trials and experimental reports
Graupe K, Cunliffe WJ, Gollnick HP, Zaumseil RP.
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Educational hair and skin info from official sources (PubMed, FDA, EMA). Does NOT replace medical consultation. Talk to a dermatologist!
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