An agonist is a type of drug that facilitates and enhances the activity of a particular neurotransmitter system.

Agonist (Drug Action)

An antagonist is a type of drug that impedes or blocks the activity of a specific neurotransmitter system.

Antagonist (Drug Action)

Drugs can be classified based on their action within a neurotransmitter system. They can either function as agonists, which enhance the system's activity, or as antagonists, which hinder it.

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The effects produced by all psychoactive drugs are a result of their interactions with the body's natural, or endogenous, neurotransmitter systems.

Psychoactive Drugs' Interaction with Neurotransmitter Systems

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

A pharmaceutical company develops a new synthetic compound. When administered, it produces effects such as heightened mood, increased energy, and a reduced need for sleep. Which statement provides the most scientifically accurate explanation for how this compound is likely producing these effects?

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