Intraoperative Combination of Ketamine and Magnesium Sulfate Infusions on Postoperative Analgesia in Open Rhinoplasty

Patients will receive a bolus of 0.5 mg/kg of ketamine given over a period of ten minutes followed by a constant infusion of 0.25 mg/kg/hr and a bolus dose of 30 mg/kg of magnesium sulfate during a 10-minute period followed by a continuous infusion of 9 mg/kg/hr.

Patients will receive saline 0.9% as a control group.