Which term is used for the study of how medications exert their effects on the body, including mechanism of action?

Which term is used for the study of how medications exert their effects on the body, including mechanism of action?

• A. Pharmacodynamics
• B. Pharmacokinetics
• C. Toxicology
• D. Therapeutics

Answer: (A)

Pharmacodynamics is the study of how medications exert their effects in the body, including the mechanism of action. It covers how drugs interact with receptors or other cellular targets, what cellular responses follow those interactions, and the dose–response relationship that links drug concentration to effect. This helps explain why a drug produces a certain effect at a given dose and how differences in receptor interactions can change potency and efficacy. Pharmacokinetics, in contrast, is about what the body does to the drug—absorption, distribution, metabolism, and excretion. Toxicology looks at adverse effects and poison-related outcomes, while therapeutics concerns the clinical use of drugs to treat disease.

Pharmacodynamics is the study of how medications exert their effects in the body, including the mechanism of action. It covers how drugs interact with receptors or other cellular targets, what cellular responses follow those interactions, and the dose–response relationship that links drug concentration to effect. This helps explain why a drug produces a certain effect at a given dose and how differences in receptor interactions can change potency and efficacy.

Pharmacokinetics, in contrast, is about what the body does to the drug—absorption, distribution, metabolism, and excretion. Toxicology looks at adverse effects and poison-related outcomes, while therapeutics concerns the clinical use of drugs to treat disease.