hydromorphone hydrochloride: a narcotic analgesic (trade name Dilaudid) used to treat moderate to severe pain
drug: a substance that is used as a medicine or narcotic
liver: large and complicated reddish-brown glandular organ located in the upper right portion of the abdominal cavity; secretes bile and functions in metabolism of protein and carbohydrate and fat; synthesizes substances involved in the clotting of the blood; synthesizes vitamin A; detoxifies poisonous substances and breaks down worn-out erythrocytes