Difficulty: Medium
Average Score: 63%
Simulated
A nurse is preparing to administer methylnaltrexone 12 mg subcutaneously to a client who has opioid-induced constipation. Available is methylnaltrexone 8 mg/0.4 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.)
Correct answer
0.6 mL
Rationale
Step 1: Determine dosage per mL: 8 mg ├À 0.4 mL = 20 mg/mL. Step 2: Calculate volume for 12 mg: 12 mg ├À 20 mg/mL = 0.6 mL. The nurse should administer 0.6 mL.