Fifty-six patients with elevated intracranial pressure caused by cerebrovascular accident, head injury, etc., were the subjects of this study. They were divided into three groups: low dose barbiturate therapy (15 patients), high dose barbiturate therapy (24 patients), and control group (17 patients). Barbiturate therapy was instituted using thiamylal, and the complications caused by barbiturate therapy were recorded. In the control group, complications occurred in the liver of two patients, but there were no renal or pulmonary complications. Pulmonary, renal, and hepatic complications were common in the barbiturate groups. Complications in the high dose therapy group were significantly more common than in the control group. Opportunistic infections occurred in ten patients, with seven patients having pneumonia. Only one patient, with pneumonia, was seen in the control group. The deaths of three patients were influenced by complications associated with barbiturate therapy, while the single death in the control group was not associated with the complication of barbiturate therapy.