A nurse is preparing to administer diltiazem IV 0.25 mg/kg IV bolus given over 2 min to a client who has atrial fibrillation and weighs 154 lb. Available is diltiazem IV injection 25 mg/5 mL How many ml should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Convert the client's weight from pounds (lb) to kilograms (kg). Weight in kg = 154 lb / 2.2 lb/kg = 70 kg Calculate the total desired dose in milligrams (mg). Desired dose (mg) = Desired dose (mg/kg) × Weight (kg) = 0.25 mg/kg × 70 kg = 17.5 mg Available concentration of the diltiazem injection = 25 mg / 5 mL. Calculate the volume in milliliters (mL) to administer. Volume (mL) = Desired dose (mg) / (Available concentration (mg) / Available volume (mL)) = 17.5 mg / (25 mg / 5 mL) = 17.5 mg / 5 mg/mL = 3.5 mL.