A client has a prescription for inamrinone (Inocor) 0.75 mg/kg IV bolus to be delivered over 3 minutes. The client weighs 80 kg. Inamrinone is available for injection 100 mg/20 ml. How many ml of inamrinone should the nurse administer?

• A. 12 mL
• B. 8 mL
• C. 15 mL
• D. 10 mL

Answer: (A)

Begin with the dose calculation: multiply 0.75 mg/kg by 80 kg to get 60 mg total dose.

Next, use the solution’s concentration: 100 mg in 20 mL equals 5 mg per mL.

Find the volume needed for 60 mg: 60 mg ÷ 5 mg/mL = 12 mL.

Since the order specifies an IV bolus given over 3 minutes, you would administer 12 mL over 3 minutes (roughly 4 mL per minute). Therefore, the correct volume to give is 12 mL.