Antispasmodic Effect of Hydroalcoholic Extracts of Rosemary and Lavender on Rat Isolated Uterus Contractions

Background: In traditional medicine, Lavender and Rosemary are referred as antispasmodic agents. However, so far their direct effects on uterus contraction have not been reported. This study aimed to assess antispasmodic effect of hydroalcoholic extracts of rosemary and lavender on rat isolated uterus contractions. Methods: In this research, the relaxant effect of hydroalcoholic extracts of these plants on rat isolated uterus contraction induced by KCl, acetylcholine, oxytocin, and electrical field stimulation (EFS) was determined and compared with nifedipine. Findings: Hydroalcoholic extracts of Lavender and Rosemary inhibited uterus contractions induced by KCl, acetylcholine, oxytocin, and EFS in a concentration-dependent manner. Conclusion: Hydroalcoholic extracts of Lavender and Rosemary have relaxant effects on uterus smooth muscle, and can be useful in prevention of premature labor.