The liver is an organ of the human body that focuses on metabolic functions. Most of the liver is in the right quarter of the ribs, and a small part is in the left quarter of the ribs. It is the largest organ in the human body, which is in the shape of an irregular wedge, with the diaphragm above it and the stomach, duodenum and other organs below it, and it can be moved up and down by 2 to 3 centimeters with the respiration, and it weighs 1,000 to 2,000 grams, and the diaphragm is divided into a large thick left lobe and a small thin right lobe with the help of a falciform ligament. The functions of the liver include secretion of bile, storage of glycogen, detoxification, hematopoiesis, coagulation, and regulation of the metabolism of proteins, fats, and carbohydrates. Most of the oral drugs need to be metabolized by the liver, which will break down the drugs into metabolic wastes through oxidative detoxification, reduction, hydrolysis, conjugation and other biochemical reactions and gradually excrete them out of the body, lowering the blood drug concentration.