Laryngoscopy and endotracheal intubation are powerful stimuli which can increase the sympathetic activity leading to tachycardia, hypertension and dysrhythmias. These hemodynamic changes are associated with the release of catecholamine (cortisol, epinephrine and nor-epinephrine). To compare the effect of oral Pregabalin and Clonidine for attenuation of hemodynamic responses to laryngoscopy and tracheal intubation