Azelaic Acid in Acne Treatment

Introduction to Azelaic Acid

Azelaic acid is an effective topical treatment for mild to moderate inflammatory acne vulgaris, offering multiple beneficial mechanisms including antimicrobial, anti-inflammatory, and comedolytic properties with a favorable safety profile, as recommended by the American Academy of Dermatology 1, 2

Azelaic acid has anti-inflammatory properties that help reduce inflammatory acne lesions, according to the American Academy of Dermatology 3
In clinical trials, azelaic acid 20% cream demonstrated significant efficacy, with 28% more patients achieving 50-100% reduction in total lesion count compared to vehicle at 3 months, as reported by the American Academy of Dermatology 2

A thin film of azelaic acid should be gently but thoroughly massaged into affected areas twice daily, in the morning and evening, as recommended by the American Academy of Dermatology 4, 5, 6
Azelaic acid is available as a 20% cream formulation for acne treatment, according to the American Academy of Dermatology 3

Common side effects of azelaic acid include pruritus, burning, stinging, tingling, erythema, dryness, rash, peeling, irritation, dermatitis, and contact dermatitis, as reported by the American Academy of Dermatology 4, 5, 6
Azelaic acid is classified as pregnancy category B, indicating minimal risk, and the risk of fetal harm is not expected based on limited systemic absorption, according to the American Academy of Dermatology 1, 4, 5, 6

Azelaic acid is particularly beneficial for patients with sensitive skin or darker skin types (Fitzpatrick IV or greater) due to its lightening effect on post-inflammatory hyperpigmentation, as recommended by the American Academy of Dermatology 1, 3
The American Academy of Dermatology conditionally recommends azelaic acid for acne treatment based on moderate certainty evidence, and it is most appropriate for mild to moderate inflammatory acne vulgaris, patients with sensitive skin, and pregnant patients requiring acne treatment (Category B) 1, 4, 5, 6, 7

The American Academy of Dermatology recommends acid azelaic for patients with sensitive skin or darker skin tones due to its effect on post-inflammatory hyperpigmentation and superior tolerability, with common side effects including pruritus, burning, tingling, erythema, dryness, and desquamation, which are generally mild and transient, especially during the first 3 weeks of treatment 8
Acid azelaic exerts anti-inflammatory activity on the catelicidin pathway, which is upregulated in acne- and rosacea-affected skin, and inhibits the synthesis of microbial cellular proteins, contributing to its anti-comedonal effect 8

In 12-week studies with 664 subjects, inflammatory lesions decreased from 17.5-17.8 at baseline to 6.8-8.9 at 12 weeks, with marked improvement or complete remission rates of 51% 8, 9

Acid azelaic can be safely combined with topical retinoids and benzoyl peroxide for improved acne treatment, although this should be considered carefully in very sensitive skin, with minimal systemic absorption (approximately 4% of the topically applied dose) and local irritation typically more pronounced during the first 3 weeks of treatment, but generally decreasing with continued use 8

The American Academy of Dermatology recommends cleaning the skin with a gentle, non-medicated cleanser before applying azelaic acid 10

Common side effects of azelaic acid include pruritus, burning, stinging, erythema, dryness, and desquamation, which are generally mild and transient 10
Contact dermatitis may occur as a side effect of azelaic acid 11
If excessive irritation occurs, reduce application frequency to once every two days, then gradually increase as tolerance improves 12

When using multiple topical agents, apply them at different times of the day to minimize cumulative irritation, as recommended by the American Academy of Dermatology 11, 12

The American Academy of Dermatology recommends applying azelaic acid 20% cream twice daily to affected areas for the treatment of hyperpigmentation, with clinical improvement typically becoming evident at 3 months, and 28% more patients achieving 50-100% reduction in lesion count compared to vehicle 13
Azelaic acid demonstrates a lightening effect on post-inflammatory dyspigmentation, making it particularly valuable for patients with darker skin types (Fitzpatrick IV or greater), with comparable efficacy to hydroquinone 4% for treating facial hyperpigmentation in darker-skinned patients 13

The American Academy of Dermatology suggests that local irritation typically decreases with continued use, and that azelaic acid can be safely combined with topical retinoids and benzoyl peroxide for enhanced treatment of both acne and hyperpigmentation, with the combination of azelaic acid 20% with glycolic acid 15-20% showing comparable efficacy to hydroquinone 4% 13