What is the term for the amount of drug taken at a given time?

• A. Dose
• B. Threshold dose
• C. Lethal dose
• D. Effective dose

Answer: (A)

Dose is the amount of drug taken at a given time. It’s the basic term for how much medication is administered during one administration, and it’s usually expressed in units such as milligrams or units, often tailored to body weight (for example, mg per kg). Understanding dose helps you see how much of a drug a person receives in one sitting, which can then be linked to its therapeutic or adverse effects.

The other terms describe more specific points related to that amount. The threshold dose is the smallest amount that begins to produce a measurable effect, not just any amount given. The lethal dose is the quantity that could cause death in a portion of the population, highlighting safety margins rather than everyday administration. The effective dose denotes the amount needed to achieve the desired therapeutic effect, which is a specific goal rather than the general per-administration quantity.