Before undergoing wisdom teeth removal, a local anesthetic will be used to numb the area of the mouth from which the tooth will be removed. If several or all of your wisdom teeth will be removed at the same time, a general anesthetic can also be used. When general anesthetic is used during wisdom teeth removal, it can often prevent the patient from feeling any pain at all. Most patients become woozy, and usually sleep through the wisdom teeth removal procedure. If you are being sedated, it's important that you don't eat or drink five hours before surgery.