What does a dose-response curve represent?

What does a dose-response curve represent?

• A. The relationship between dose and response
• B. The time to onset of action
• C. The distribution of a drug in tissues
• D. The rate of drug metabolism

Answer: (A)

A dose–response curve shows how the effect of a drug changes with different doses. As you increase the dose, the response typically rises and then plateaus at a maximum effect; this shape helps you compare potency (where the curve begins to rise) and efficacy (how high the response can go). It isn't about how quickly the drug acts, where it distributes in the body, or how fast it’s metabolized—those are pharmacokinetic topics. So the best description is the relationship between dose and response.

A dose–response curve shows how the effect of a drug changes with different doses. As you increase the dose, the response typically rises and then plateaus at a maximum effect; this shape helps you compare potency (where the curve begins to rise) and efficacy (how high the response can go). It isn't about how quickly the drug acts, where it distributes in the body, or how fast it’s metabolized—those are pharmacokinetic topics. So the best description is the relationship between dose and response.