A while ago, American Society of Anesthesiology declared that prolonged fasting before surgery was no longer recommended. They reported that fasting doesn't prevent vomiting or other complications and it can lead to headaches, irritability and even dehydration.
In a recent study 90% of patients are still being instructed not to eat or drink after midnight before surgery. The suggested guidelines now say have a normal meal if the procedure is eight hours away or a light meal if it's six hours away. Clear liquids can be had up to two hours before surgery. So if you have got surgery scheduled, let your Doctor know you've got the real scoop or should I say knife and fork.