Mechanism of action

Definition

Mechanism of action describes how a drug produces its effects in the body. It provides insight into the biochemical interactions at the molecular level.

5 Must Know Facts For Your Next Test

1. The mechanism of action often involves binding to specific receptors or enzymes.
2. Understanding a drug's mechanism of action helps predict its therapeutic and adverse effects.
3. Mechanisms can be classified based on the site of action, such as cellular, tissue, or systemic levels.
4. A single drug can have multiple mechanisms of action affecting different pathways.
5. Drugs with similar mechanisms of action often share similar side effects and therapeutic uses.

Review Questions

• What does the mechanism of action reveal about a drug?
• How can understanding the mechanism of action help predict side effects?
• Why might two drugs with different chemical structures have similar therapeutic effects?

Related terms

Pharmacokinetics: The study of how drugs move through the body including absorption, distribution, metabolism, and excretion.

Receptor: A protein molecule that receives and responds to a neurotransmitter, hormone, or other substance.

Enzyme Inhibition: A process where a molecule binds to enzymes and decreases their activity.