Opioid Free Anaesthesia Versus Opioid Based Anesthesia for Laparscopic Cholecystectomy

I.V Fentanyl (1-2ug/kg) before induction of general anesthesia with I.V propofol (1-2mg/kg), atracurium (0.5mg/kg). Intermittent boluses of fentanyl will be given intraoperatively when needed to maintain the change in hemodynamics within 20 % of the baseline.

"* IV Ketamine (0.25-0.5 mg/kg) before induction of general anesthesia with I.V propofol (1-2 mg/kg), atracurium (0.5mg/kg) followed by(0.25mg /min) infusion of ketamine for maintenance~* Dexamethasone I.V (8 mg) will be given before induction of general anesthesia.~* magnesium sulphate (20 mg/kg)in 100ml saline within 10 mints Followed by infusion of magnesium sulphate at rate of (10mg/kg/h)."