Combined oral contraceptive pills for treatment of acne.

backgroundAcne is a common skin disorder among women. Although no uniform approach to the management of acne exists, combination oral contraceptives (COCs), which contain an estrogen and a progestin, often are prescribed for women.

objectivesTo determine the effectiveness of COCs for the treatment of facial acne compared to placebo or other active therapies. SEARCH STRATEGY: We searched the computerized databases Cochrane Skin Group trial register, Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, POPLINE, Biological Abstracts and LILACS for randomized controlled trials of COCs and acne. We wrote to authors of identified trials to seek any unpublished or published trials that we might have missed. SELECTION CRITERIA: All randomized controlled trials reported in any language that compare the effectiveness of a COC containing an estrogen and a progestin to placebo or another active therapy for acne in women were eligible. DATA COLLECTION AND ANALYSIS: We extracted data on total and specific (i.e. open or closed comedones, papules, pustules and nodules) facial lesion counts; acne severity grades; global assessments by the clinician or the participant and discontinuation due to adverse events. Data were entered and analyzed in RevMan 4.2. MAIN

resultsThe search yielded five placebo-controlled trials that made three different comparisons and 14 trials that made nine comparisons between two COC regimens. An additional trial compared a COC to an antibiotic. COCs reduced acne lesion counts, severity grades and self-assessed acne compared to placebo. Differences in the comparative effectiveness of COCs containing varying progestin types and dosages, though, were less clear. COCs that contained chlormadinone acetate or cyproterone acetate improved acne better than levonorgestrel although this apparent advantage was based on limited data. A COC with cyproterone acetate might result in better acne outcomes than one with desogrestrel; however, the three studies comparing these COCs produced conflicting results. Likewise, levonorgestrel showed a slight improvement over desogestrel in acne outcomes in one trial, but a second trial found no difference between the COCs. REVIEWERS'

conclusionsThe three COCs evaluated in placebo-controlled trials are effective in reducing inflammatory and non-inflammatory facial acne lesions. Few differences were found in acne effectiveness between COC types. How COCs compare to alternative acne treatments is unknown since limited data were available regarding this question.