title: Azelaic acid in the treatment of papulopustular rosacea: a systematic review of randomized controlled trials.
abstract: OBJECTIVE
  To evaluate the clinical efficacy of topical 20% azelaic acid cream and 15% azelaic acid gel compared with their respective vehicles and metronidazole gel in the treatment of papulopustular rosacea.
  
  
  METHODS
  Electronic searches of MEDLINE, EMBASE, BIOSIS, and SciSearch through July or August 2004 and the Cochrane Central Register of Controlled Trials through 2004 (issue 3). We performed hand searches of reference lists, conference proceedings, and clinical trial databases. Experts in rosacea and azelaic acid were contacted.
  
  
  METHODS
  Randomized controlled trials involving topical azelaic acid (cream or gel) for the treatment of rosacea compared with placebo or other topical treatments. Two authors independently examined the studies identified by the searches. Ten studies were identified, of which 5 were included (873 patients).
  
  
  METHODS
  Two authors independently extracted data from the included studies, then jointly assessed methodological quality using a quality assessment scale.
  
  
  RESULTS
  Because standard deviation data were not available for 4 of the 5 studies, a meta-analysis could not be conducted. Four of the 5 studies demonstrated significant decreases in mean inflammatory lesion count and erythema severity after treatment with azelaic acid compared with vehicle. None of the studies showed any significant decrease in telangiectasia severity.
  
  
  CONCLUSIONS
  Azelaic acid in 20% cream and 15% gel formulations appears to be effective in the treatment of papulopustular rosacea, particularly in regard to decreases in mean inflammatory lesion count and erythema severity. Compared with metronidazole, azelaic acid appears to be an equally effective, if not better, treatment option.
authors.affiliation: Department of Dermatology, Eastern Virginia Medical School, Norfolk, VA, USA.
authors.forename: Rosemarie H
authors.initials: RH
authors.lastname: Liu
authors.forename: Molly K
authors.initials: MK
authors.lastname: Smith
authors.forename: Sameh A
authors.initials: SA
authors.lastname: Basta
authors.forename: Evan R
authors.initials: ER
authors.lastname: Farmer
mesh_terms: D000279:Administration, Cutaneous; D003879:Dermatologic Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D003998:Dicarboxylic Acids / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012393:Rosacea / Q000188:drug therapy* / Q000473:pathology; D012720:Severity of Illness Index
chemical_list: D003879:Dermatologic Agents; D003998:Dicarboxylic Acids; C010038:azelaic acid