IRCT20210614051574N2 IRCT 2021-07-12 Esfahan University of Medical Sciences Clonidine and hemodynamics and sedation Comparative study of the effect of clonidine with placebo before surgery on hemodynamics and sedation of patients in stereotaxic surgery 2021-08-10 anticipated 72 Complete https://irct.ir/trial/57188 interventional Randomization: Not randomized, Blinding: Not blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment. 2-3 Brain Tumor. Intervention 1: Intervention group: Patients in this group receive clonidine in a dose of 0.2 mg, 2 hours before the operation. Blood pressure and sedation of patients in this group will be measured in one, three, five, ten, fifteen minutes after the intervention and at the time of entering the recovery and every fifteen minutes in the recovery. Intervention 2: Control group: Patients in this group receive placebo tablets, which are very similar to clonidine, 2 hours before the operation. Blood pressure and sedation of patients in this group will be measured in one, three, five, ten, fifteen minutes after the intervention and at the time of entering the recovery and every fifteen minutes in the recovery. Yes - There is a plan to make this available What will be shared: All data can be shared after people have requested. When: Six months after publishing the results. To whom: Academic researchers Conditions: Scientific uses Where to obtain: Website of the Research Committee of Isfahan University of Medical Sciences How to obtain: Clear request on the site to access the data by the individual and then review the request by the research assistant within 2 weeks and then allow access to the data. Comments: