A nurse is preparing to administer indomethacin 75 mg PO twice a day. The medication is available as 25 mg/5 mL. How many milliliters should be given per dose?

A nurse is preparing to administer indomethacin 75 mg PO twice a day. The medication is available as 25 mg/5 mL. How many milliliters should be given per dose?

• A. 10 mL
• B. 15 mL
• C. 20 mL
• D. 25 mL

Answer: (B)

The main idea is converting the prescribed dose to a volume using the medication’s concentration. The solution contains 25 mg in 5 mL, which is 5 mg per mL. To dose 75 mg, you need 75 mg ÷ 5 mg/mL = 15 mL. Alternatively, set up a proportion: 25 mg/5 mL = 75 mg/x mL, which gives x = 15 mL. So, 15 mL per dose.

The main idea is converting the prescribed dose to a volume using the medication’s concentration. The solution contains 25 mg in 5 mL, which is 5 mg per mL. To dose 75 mg, you need 75 mg ÷ 5 mg/mL = 15 mL. Alternatively, set up a proportion: 25 mg/5 mL = 75 mg/x mL, which gives x = 15 mL. So, 15 mL per dose.