THANKS FOR ASKING QUERY,
is a condition in which medically induced coma
occurs.In this relaxation of smooth muscles , sleep , analgesia, amnessia, loss of control of reflexes of autonomic nervous system occurs.
General anesthesia is used to carry out the various surgical procedures effectively without patient interference.
Before giving general anesthesia patient is completely medically evaluated to check its fittnes.
Prior to general anesthesia patients are strictly kept NPO nill by per oral that is patient has to take nothing orally atleast for the period of 8 hrs before the procedure.
So i suggest you to avoid anything orally for a period of at least 8 hrs.
hope this will help u.