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Vol. 213, No. 3, 2006
Issue release date: October 2006

Meta-Analysis of 5% Imiquimod and 0.5% Podophyllotoxin in the Treatment of Condylomata Acuminata

Yan J. · Chen S.-L. · Wang H.-N. · Wu T.-X.
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Abstract

Background: Genital warts are a common sexually transmitted disease caused by human papillomaviruses. Podophyllotoxin 0.5%, approved for patient self-administration, has been used most extensively in the treatment of genital warts. Imiquimod, a novel immune response modifier capable of inducing interferon-α and a variety of cytokines, has been examined as a potential treatment for genital warts. But 0.5% podophyllotoxin and 5% imiquimod have not been compared in any extensive and formal studies, although they are the common topical agents for genital warts. Objective: To evaluate the efficacy and safety of topical 5% imiquimod and 0.5% podophyllotoxin in the treatment of genital warts. Methods: We searched Medline (1966 to June 2005), Embase (1974 to June 2005) and the Cochrane Controlled Trials Register (issue 3, 2005). Randomized controlled trials of 5% imiquimod or 0.5% podophyllotoxin in the treatment of genital warts were collected. Two reviewers extracted the data and independently assessed the quality of the included medical literature. Then, meta-analysis was conducted. Results: Twelve studies including 3 placebo-controlled trials of imiquimod and 9 placebo-controlled trials of podophyllotoxin were included. The clinical cure rates of imiquimod and podophyllotoxin were 50.34 and 56.41%, respectively, without statistically significant differences between the two (p > 0.05). A combined analysis of the 3 studies on imiquimod showed a statistically significant difference to the placebo group [pooled odds ratio (OR) 11.65, 95% confidence interval (CI) 6.05–22.44], as did a combined analysis of the 9 studies on podophyllotoxin (pooled OR 16.70, 95% CI 7.06–39.48). The most common adverse events of imiquimod were erythema, erosion, excoriation, itching and burning; those of podophyllotoxin were burning, pain, erosion, itching and inflammation. Conclusion: Imiquimod and podophyllotoxin possess similar curative effects on condylomata acuminata but podophyllotoxin has more serious adverse effects.



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