Role of Non-Selective Beta-Adrenergic Blocker in Severe TBI

This group Will receive propranolol intravenously at a dose of 1 mg every 6 h for 7 days, and doses will be held if heart rate less than 60 bpm, mean arterial pressure less than 65 mmHg

This group Will receive 1ml of sterile 0.9% normal saline IV every 6 hours for 7 days