You have 60 mg of drug in 120 mL; you need to deliver 15 mg/hr. What is mL/hr?

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Multiple Choice

You have 60 mg of drug in 120 mL; you need to deliver 15 mg/hr. What is mL/hr?

Explanation:
Think in terms of converting the required dose per hour into a volume per hour using the solution’s concentration. The solution has 60 mg in 120 mL, which is 0.5 mg per mL. To deliver 15 mg each hour, you need 15 mg ÷ 0.5 mg/mL = 30 mL per hour. You can check by multiplying back: 30 mL/hr × 0.5 mg/mL = 15 mg/hr. So the infusion rate should be 30 mL per hour.

Think in terms of converting the required dose per hour into a volume per hour using the solution’s concentration. The solution has 60 mg in 120 mL, which is 0.5 mg per mL. To deliver 15 mg each hour, you need 15 mg ÷ 0.5 mg/mL = 30 mL per hour. You can check by multiplying back: 30 mL/hr × 0.5 mg/mL = 15 mg/hr. So the infusion rate should be 30 mL per hour.

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