Before any surgery, your doctor will likely ask you to avoid eating or drinking. Understanding why you cannot eat or drink before surgery is important for your safety. Eating too close to surgery, especially under general anaesthesia, can cause complications such as vomiting or aspiration, where food enters the lungs. Fasting also applies to some procedures with regional anaesthesia or IV sedation. Following your surgeon’s fasting instructions ensures your procedure goes smoothly and reduces the risk of serious complications.
Risks of Eating Before Surgery
Having food in your stomach during surgery can be dangerous. The main reason you cannot eat or drink before surgery is to prevent aspiration—a condition where food or liquids enter the airway. Under anaesthesia, your body cannot react, which can lead to serious issues such as pneumonia. Postoperative nausea and vomiting (PONV) is also common when the stomach is not empty. Following pre-surgery fasting rules keeps you safe and helps doctors perform the procedure without complications.
Last Meal Before Surgery
Medical guidelines explain why you cannot eat or drink before surgery. They allow a light meal up to six hours before surgery and clear liquids up to two hours before anaesthesia. Heavy or fatty foods, protein-rich meals, and fried items should be avoided at least eight hours before surgery. Your last meal should be light, such as toast, crackers, or soup. Avoid overeating right before fasting, as heavy meals take longer to digest.
Protein-rich foods such as lean chicken, fish, tofu, or low-fat dairy are recommended in the days leading up to surgery to support healing. Clear liquids up to two hours before surgery can help reduce discomfort from fasting. Always follow your surgeon’s instructions and provide complete information about your last food and drink intake.
