"Nil by Mouth" is a medical term that means a patient should not eat or drink anything. This is often required before surgery or certain medical tests to ensure the stomach is empty. It helps prevent complications, such as aspiration, where food or liquid enters the lungs. Patients on a nil by mouth order may receive fluids and nutrition through an intravenous (IV) line. This ensures they stay hydrated and receive necessary nutrients while they cannot consume food or drink. Medical staff will monitor the patient's condition closely during this time to ensure their safety and comfort.