A nurse is preparing to administer tobramycin 3 mg/kg/day IM in three divided doses to a client who weighs 85 kg. The amount available is tobramycin 40 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.) ________ mL

Step 1 is to calculate the total daily dose in milligrams (mg) Total daily mg = Weight in kg × Dosage (mg/kg/day) 85 × 3 = 255 mg/day Step 2 is to calculate the dose per administration (three divided doses) mg per dose = Total daily mg ÷ 3 255 ÷ 3 = 85 mg per dose Step 3 is to calculate the volume to administer per dose in milliliters (mL) (Ordered dose ÷ Available dose) × Available volume = Result (85 ÷ 40) × 1 = Result 85 ÷ 40 = 2.125 Step 4 is to round to the nearest tenth 2.125 ≈ 2.1 Answer: 2.1