A nurse is preparing to administer methadone 2.5 mg PO every 8 hr to a client who is postpartum. Available is methadone oral solution 10 mg/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.)

Given: Prescribed dose: 2.5 mg of methadone per dose Available concentration: 10 mg/5 mL Steps to solve: Determine the volume to be administered: Set up a proportion to solve for the unknown volume (X): 10 mg/5 mL = 2.5 mg/X mL Cross-multiplying gives us: 10 mg x X mL = 2.5 mg x 5 mL Simplifying: 10X = 12.5 Solving for X: X = 12.5 / 10 = 1.25 mL Round off to the nearest tenth: 1.3 mL