Drug interactions
Azelaic acid + Urea
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Overview
Combined topical use may increase local irritation; urea can enhance percutaneous penetration of coapplied agents, potentially intensifying azelaic acid’s irritancy.
Mechanism of action
Additive local irritant/keratolytic effects; urea disrupts stratum corneum and may increase penetration of azelaic acid.
Clinical management
Avoid simultaneous application to the same site; if both are needed, separate applications or use on different days/sites. Start with low frequency and monitor for irritation.
Drug reference
References
- Urea (Topical) monograph — Lexicomp
- Azelaic Acid (topical) Prescribing Information (Finacea) — FDA Label
Frequently asked questions
Can I take Azelaic acid with Urea?
The interaction is rated: Moderate. Combined topical use may increase local irritation; urea can enhance percutaneous penetration of coapplied agents, potentially intensifying azelaic acid’s irritancy.
How serious is the interaction between Azelaic acid and Urea?
The interaction is rated: Moderate. Evidence level: Moderate.
How is the interaction between Azelaic acid and Urea managed?
Avoid simultaneous application to the same site; if both are needed, separate applications or use on different days/sites. Start with low frequency and monitor for irritation.
Why do Azelaic acid and Urea interact?
Additive local irritant/keratolytic effects; urea disrupts stratum corneum and may increase penetration of azelaic acid.
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