43. A nurse is caring for a client with a renal calculus and…

43. A nurse is caring for a client with a renal calculus and is reporting flank pain. The healthcare provider has ordered hydromorphone hydrochloride (Dilaudid) 4 mg IM every 4 hours as needed for pain. The medication comes in a vial that contains 10 mg/ml. How many mL should the nurse administer?  (Round to the nearest tenth. Numeric answer only).