Nausea and vomiting represent one of the most common side effects of anesthesia with an incidence of 20% to 30%. This is better than the days of ether anesthesia where the rate was over 50%. A previous history of PONV , female sex , young age, obesity and type of surgical procedure influence the incidence. New drugs such as zofran are effective in combating this side effect. If you have had a serious problem with nausea and vomiting, please stress this at the preoperative interview. Your anesthetic plan will take this into account.