A comparison of topical azelaic acid 20% cream and topical metronidazole 0.75% cream in the treatment of patients with papulopustular rosacea.

Author(s): Maddin S

Affiliation(s): Division of Dermatology, University of British Columbia, Vancouver, Canada.

Publication date & source: 1999-06, J Am Acad Dermatol., 40(6 Pt 1):961-5.

Publication type: Clinical Trial; Randomized Controlled Trial

BACKGROUND: Although it is important for physicians to have sufficient clinical data on which to base treatment decisions, little comparative data exist regarding newer treatment modalities for rosacea. OBJECTIVE: The goal of the study was to compare the efficacy and safety of topical azelaic acid 20% cream and topical metronidazole 0.75% cream in the treatment of patients with papulopustular rosacea. Parameters of patient satisfaction to treatment were also assessed. METHODS: Forty patients with the clinical manifestation of symmetric facial rosacea were investigated in this single-center, double-blind, randomized, contralateral split-face comparison clinical trial. RESULTS: After 15 weeks of treatment, both azelaic acid and metronidazole induced significant, albeit equal reductions in the number of inflammatory lesions (pustules and papules). A significantly higher physician rating of global improvement was achieved with azelaic acid. Changes in the rosacea signs and symptoms of dryness, burning, telangiectasia, and itching were equal between treatments. A reduction in erythema tended toward significance with azelaic acid at week 15. A trace amount of stinging on application was noted with azelaic acid; however, such discomfort did not appear to concern patients because their overall impression of azelaic acid was superior to that of metronidazole. CONCLUSION: Azelaic acid 20% cream provides an effective and safe alternative to metronidazole 0.75% cream with the added benefit of increased patient satisfaction.