A nurse is preparing to administer lidocaine 50 mg IV bolus. Available is lidocaine 200 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

To calculate the volume of lidocaine to administer, you would use the formula: Volume = Dose / Concentration. Here, the dose needed is 50 mg, and the concentration available is 200 mg/mL. Dividing the required dose by the concentration gives: 50 mg / 200 mg/mL = 0.25 mL.