Dysmenorrhoea isone of the most common gynaecological problem found in reproductive age group of woman. It tends to hamper a woman’s day to day life during menstrual phase enough to drag her down from race. Primary dysmenorrhoea often symptomatically correlated with Udavartini Yonivyapad described in Ayurveda classics. Many effective herbal remedies have been used since long for the effective management of menstrual cramps and discomfort. In folk lore practice ‘Yavani’ – Trachyspermum ammi is used in western part of India for the same. Present study was aimed to evaluate and compare analgesic effect of trachyspermum ammi extracton Primary dysmenorrhoea. Where a group of 20 female subjects of reproductive age group with primary dysmenorrhoea were selected and categorized in 2 groups i.e. trial and control group. Trial group was administered with Aqueous Extract of Trachyspermum ammi for 3 days during menstruation whereas control group was administered with standard drug Mefenamic acid for the same duration. Evaluation was done before and after the intervention with parameters such as duration and intensity of pain, episodes of anorexia, nausea, etc. The result is significantly indicates effectiveness ofYavani for the management of Primary dysmenorrhoea.