Heparin 5,000 units IV is prescribed as a loading dose, to be administered over 5 minutes for a client with thrombophlebitis. The vial is labeled, "10,000 units/mL." How many mL should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

You can calculate the volume of heparin to administer using the following formula: Volume (mL) = Dose (units) / Concentration (units/mL) Here's what we know: Dose: 5,000 units heparin (given) Concentration: 10,000 units/mL (from the vial label) Calculation: Volume (mL) = 5,000 units / 10,000 units/mL Volume (mL) = 0.5 mL Therefore, the nurse should administer 0.5 mL of heparin.