Dubagunta Naga Likhitha, Nayan Sriramula, R. Rajeshwar Reddy and K.S.S.G.C.Kumar 2022. Comparison between oral clonidine and oral pregabalin as premedication to attenuate pressor response to direct laryngoscopy and endotracheal intubation. International Journal of Health and Clinical Research. 5, 1 (Jan. 2022), 680–683.