Maintenance dose is best described as which of the following?

• A. The amount of drug needed to maintain a safe concentration of the drug in the body
• B. The continued administration of a drug after the disease has been eliminated
• C. The ongoing drug treatment for a chronic illness
• D. The tapering off of doses over a period of time

Answer: (A)

Maintaining a drug’s level within a safe, therapeutic range requires a maintenance dose—the amount given at regular intervals to replace what the body eliminates between doses. After a loading dose brings levels up quickly, the maintenance dose compensates for clearance and distribution so the drug stays within the desired concentration, balancing efficacy and safety.

That’s why this option best describes maintenance dose: it’s specifically about keeping the drug concentration in a safe range over time. Other ideas describe continuing therapy in general or tapering off, but they don’t define the dosing strategy used to sustain a stable, safe level in the body.