A 2.0 kg animal requires 0.75 mg/kg of a medication. If the solution is 10 mg/mL, how many milliliters should be administered?

A 2.0 kg animal requires 0.75 mg/kg of a medication. If the solution is 10 mg/mL, how many milliliters should be administered?

• A. 0.15 mL
• B. 0.5 mL
• C. 1.0 mL
• D. 1.5 mL

Answer: (A)

Dosing is done by first calculating the total milligrams needed from the animal’s weight, then converting that to the volume using the solution’s concentration. For this animal: 2.0 kg × 0.75 mg/kg = 1.5 mg total. The solution is 10 mg per mL, so 1 mL provides 10 mg. To deliver 1.5 mg, the required volume is 1.5 mg ÷ 10 mg/mL = 0.15 mL. Therefore, administer 0.15 mL.

Dosing is done by first calculating the total milligrams needed from the animal’s weight, then converting that to the volume using the solution’s concentration. For this animal: 2.0 kg × 0.75 mg/kg = 1.5 mg total. The solution is 10 mg per mL, so 1 mL provides 10 mg. To deliver 1.5 mg, the required volume is 1.5 mg ÷ 10 mg/mL = 0.15 mL. Therefore, administer 0.15 mL.