The study has been carried out for the comparative analysis of relevant literature in order to highlight the present topic 'Clinical study on effect on Virechana karma (therapeutic purgation)'. Total no. of 40 cases has been selected from OPD and IPD of Panchakarma department, through proper history taking and clinical examination prior to VirechanaKarma. Only VirechanaKarmaYogya subjects were selected for the VirechanaKarma. Analysis of VirechanKarma on the basis of Vegiki (purgative bouts), Maniki (quantity), Langiki (clinical features) and Aantiki (end product) features were done in this study. In this study a highly significant relief was found in patients i.e. p<0.001 due to Virechana mainly vitiated PittaDosha (the heat energy in the body) and secondary Kaphadosha (mucus) and VataDosha (subtle energy associated with movement) are being expelled out which might have accounted for better relief in VirechanYogya (indicated) individuals (Pitta Pradhan Vyadhi (vitiated pitta), RaktajRoga (hemopoietic diseases), ShodhanYogyaAvastha (detoxification), etc.) in the above group of patients. VirechanaDravyas have properties like Tikshna (hyperfunction), Sukshma(subtle), Ushna (heat), etc. are described in Ayurvedic classics which play a vital role in the mode of action of VirechanaKarma has also been explained under probable mode of action.