Cochrane Review: Combined oral contraceptive pills for treatment of acne
Authors: Arowojolu Ayodele O , Gallo Maria F , Lopez Laureen M , Grimes David A , Garner Sarah E 
Published: September 2011

AbstractBackgroundAcne 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 combined oral contraceptives (COCs) for the treatment of facial acne compared to placebo or other active therapies.Search strategyWe searched for randomized controlled trials of COCs and acne in the computerized databases of the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, POPLINE, and LILACS. We also searched for clinical trials in ClinicalTrials.gov and the International Clinical Trials Registry Platform (ICTRP). We wrote to authors of identified trials to seek any unpublished or published trials that we might have missed.Selection criteriaAll randomized controlled trials reported in any language that compared the effectiveness of a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 analysisWe 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.Main resultsThe search yielded 25 trials: 7 placebo‐controlled trials made 4 different comparisons, 17 trials made 13 comparisons between 2 different COC regimens, and 1 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 desogestrel; 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 the COC groups were similar.Authors' conclusionsThe four COCs evaluated in placebo‐controlled trials are effective in reducing inflammatory and non‐inflammatory facial acne lesions. Few important differences were found between COC types in their effectiveness for treating acne. How COCs compare to alternative acne treatments is unknown since limited data were available regarding this question.Plain Language SummaryEffect of birth control pills on acne in womenAcne is a common skin problem for women. Several treatments are available. Combined birth control pills, which have the hormones estrogen and progestin, are often prescribed for women with acne. This review looked at how well birth control pills worked to treat facial acne.We did a computer search for studies of birth control pills and acne treatment. Outcomes could be the amount of acne, how severe the acne was, and how many women dropped out early due to problems. We wrote to researchers to find other trials. We included randomized trials in any language that compared two types of birth control pills, a pill and a placebo or 'dummy,' or a pill and another acne treatment.We found 25 trials: 7 trials used 'dummies,' 17 compared different types of birth control pills, and 1 compared a pill and an antibiotic. The three pills studied in trials with dummies worked well to reduce facial acne. In comparing pills with different hormones, no important differences were seen.The conclusions did not change when we added trials in this update to the other studies. Most trials compared two types of pills for acne treatment. Better quality studies are needed to compare one birth control pill with another. How birth control pills compare to other acne treatments like antibiotics is unclear. Since birth control pills improve acne, they can be used to treat women with acne who also want birth control.