A nurse is preparing to administer 250 mg of an antibiotic IM. Available is 3 g/5 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.)

Convert the Available Dose from grams (g) to milligrams (mg) Available Dose = 3 g Conversion factor: 1 g = 1,000 mg Available Dose (mg) = 3 g x 1,000 mg/g = 3,000 mg Calculate Volume (mL) Ordered Dose (D) = 250 mg Available Dose (H) = 3,000 mg Quantity (Q) = 5 mL Volume (mL) = (Dose Ordered (D) / Dose Available (H)) x Quantity (Q) = (250 mg / 3,000 mg) x 5 mL = 0.08333 x 5 mL = 0.41667 mL Round to the Nearest Tenth = 0.4.