<qa>  What is the maximum amount of labetalol in the patients intravenousIf the blood pressure is not controlled reduction in BP to 160 systolic and 110 mmHg diastolic within 40 minutes of beginning labetalol therapy, the patient will receive an intravenous dose of 20mg labetalol, which can be increased in an escalating dose to a maximum of 80mg 20 mg, 40 mg, 80 mg every 20 minutes as necessary to control the blood pressure until a cumulative maximum of 240 mg has been given. It is extremely important that the blood pressure is controlled as outlined in this protocol and any deviation from these instructions will be deemed a protocol violation. 