The Effect of Peppermint Oil on Symptomatic Treatment of Pruritus in Pregnant Women

Itching is one of the most common skin symptoms. Generalized pruritus occurs in 1-8% of pregnant women. It can create unpleasant feeling for these women especially at nights. Most pregnant women avoid using synthetic drugs because of their side effects. Peppermint is a plant which has been used as a traditional drug in Iran. It decreases skin's temperature. This study was done to determine the effects of peppermint oil on symptomatic treatment of pruritus in pregnant women attending to Rasoul Akram Hospital in Rasht, 2011. In this triple-blind clinical trial, 96 randomly selected subjects diagnosed with pruritus gravidarum were studied (47 cases and 49 controls). A bottle containing 60 mL of peppermint oil 0.5% in sesame oil and identical placebos were provided to be taken twice a day during 2 weeks by the case and control groups, respectively. The severity of the itch was assessed and compared before and after the study by VAS system. The results were analyzed by SPSS. Statistical methods such as descriptive analysis, independent samples' t-test, paired samples' t-test and Chi-square were employed. The severity of the itch in the treated group with peppermint oil in comparison with the placebo group, showed a significant statistical difference (p = 0.003). In accordance with the results of this study, it seems that peppermint oil can be effective in reducing the severity of Pruritus Gravidarum. More studies with larger sample sizes are required to confidently declare the mentioned results.