If you are having surgery and you drink alcohol you need to discuss this with your doctor. And be honest with the doctor, after all hiding your addiction could cause major problems for you! If you have more than one or two drinks a day, you could be putting yourself at risk with surgery. Severe withdrawal can cause death during or after surgery. Some of the problems caused by severe withdrawal are seizures, nervous system damage, irregular hearbeat, and respiratory failure. Moderate drinking, one or two drinks a day, is not usually a problem but more than that just might get you into serious trouble. If you are planning to have surgery and you drink very much you should be very forthright with your surgeon and you should cut back on the alcohol in preparation for surgery. Afterall, your life could depend on it.