You refrain from eating and/or drinking prior to surgery in order to prevent the risks of aspirating gastric contents during your surgery. This complication is very serious and you need to strictly abide by our recommendations. This has nothing to do with nausea and vomiting after your surgery as some think.
We have very clear policies as to specific times before surgery when you must refrain from eating and/or drinking. These are all based on safety standards. Please note that the standards have been revised recently. We believe that the fasting time should be as short as possible before your surgery. You will not improve your safety by not eating or drinking longer than necessary; in fact, at times you may complicate things a bit.