How much medicine is in 0.5 mL?

How much medicine is in 0.5 mL?

• A. 3 mg
• B. 15 mg
• C. 7.5 mg
• D. 1 mg

Answer: (C)

To find how much medicine is in a given volume, multiply the volume by the concentration (mg per mL). The amount in milligrams equals (mg/mL) × (mL). If the solution is 15 mg per 1 mL, then 0.5 mL carries 15 × 0.5 = 7.5 mg. So 0.5 mL contains 7.5 mg. If the concentration were different, you’d use that concentration in the same calculation (mg/mL) × (mL) to get the dose.

To find how much medicine is in a given volume, multiply the volume by the concentration (mg per mL). The amount in milligrams equals (mg/mL) × (mL). If the solution is 15 mg per 1 mL, then 0.5 mL carries 15 × 0.5 = 7.5 mg. So 0.5 mL contains 7.5 mg. If the concentration were different, you’d use that concentration in the same calculation (mg/mL) × (mL) to get the dose.