A nurse is preparing to administer lactulose 30 g PO four times daily to a client who has portal-systemic encephalopathy. The amount available is lactulose al solution 10 g/15 ml. How many ml. should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero)

Identify the ordered dose and the available concentration Ordered Dose: 30 g Available Concentration: 10 g per 15 mL Calculate the volume to administer per dose using the Dose/Have method Amount to administer = (Ordered Dose ÷ Dose on Hand) × Quantity Quantity corresponding to the Dose on Hand = 15 mL Volume = (30 ÷ 10) × 15 = 3 × 15 = 45 mL