Inclusion Criteria:  ASA Ι and II. Patients undergoing surgeries for removal of supratentorial tumors. Age (18-60) years. Both sexes.  Exclusion Criteria:  Impaired renal functions. Systemic hypertension. Dysrhythmia. Heart failure. Glasgow coma scale less than 12. The need for postoperative ventilation. History of allergy to the study drugs. Surgeries lasting more than 6 hours. Pregnancy. Bronchial asthma