Pakshaghata is one among the vatavyadi, considered under astamahagada, which is swabhavatahduschikitsya. When the greatly aggravated vata invades the urdhwa, adha and thiryakgatadhamanis, then it destroys any one half of the body which is called as pakshaghata. By this, affected side of the body becomes incapable of any work. In Vatavyadhi, basti is considered as the best treatment, but for pakshaghatasneha is the line of treatment. Acharya charaka also explained swedana and snehayuktavirechana in pakshagata.So, Erandataila is selected for virechana in the patients suffering from pakshaghata.Virechana is the chiefly advocated, purificatory measure in this disease and all the acharyas mentioned, virechana is one among the chief line of treatment for pakshaghata. So it is bagged in the present study for treatment purpose. In pakshagata, snehana and snehayuktavirechana explained by acharyavagbhata.Eranda is said to be sresthavatahara&taila is considered best to combat aggravated vata. For that, in this study Erandataila is taken for nityavirechana to the patient of Pakshaghat which consists the above & fulfil both the needs. As per Vagbhatapurvakarma is not necessary for nityavirechana. Thus, considering the above fact a Clinical study to evaluate the efficacy of Virechana Karma in pakshaghata is planned along with its conceptual study as mentioned in Brihatrayee.