Alpha blockers preoperatively, usualy we use terazosin

Thank you for your response, Dr. Rolevich

We still use alpha blockage with phenoxibenzamine. The dosage should be titrated starting with 10 mg a day, until the patient feels orthostatic hypotension. If he develops tachycardia, a beta blockage should be added. The patient has to be well hydrated. He could start a oral balanced electrolyte fluid as soon as starting the alpha-blockage.

The real danger is during the preoperative period where the Anesthesiologist should be aware of the sudden changes in arterial pressure.

Alpha blockage and preoperative well hydratation are essential.

Thank you Jorge and Francesco for your input.