A nurse is preparing to administer lorazepam 0.044 mg/kg IV bolus to a client who weighs 50 kg (110 lb). The amount available is lorazepam injection 4 mg/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.)

Step 1 is to calculate the total dose of lorazepam required based on the client’s weight. 0.044 mg/kg × 50 kg = 2.2 mg Result after Step 1 = 2.2 mg Step 2 is to identify the concentration of the medication available. The concentration is 4 mg per 1 mL. Step 3 is to calculate the volume needed to deliver the prescribed dose. 2.2 mg ÷ 4 mg/mL = 0.55 mL Result after Step 3 = 0.55 mL Step 4 is to round the calculated volume to the nearest tenth as instructed. 0.55 mL rounds to 0.6 mL