---
title: "Antipsychotic Medications — AP Psych Definition & Exam Guide"
description: "Antipsychotic medications treat schizophrenia by blocking dopamine receptors to reduce hallucinations and delusions. Learn how AP Psych tests this in Unit 8."
canonical: "https://fiveable.me/ap-psych-revised/key-terms/antipsychotic-medications"
type: "key-term"
subject: "AP Psychology"
---

# Antipsychotic Medications — AP Psych Definition & Exam Guide

## Definition

Antipsychotic medications are drugs used to treat psychotic disorders like schizophrenia by blocking dopamine receptors in the brain, which reduces positive symptoms such as hallucinations, delusions, and disordered thinking.

## What It Is

Antipsychotic medications are drugs that treat psychotic disorders, most famously [schizophrenia](/ap-psych-revised/key-terms/schizophrenia "fv-autolink"), by tamping down [the brain](/ap-psych-revised/unit-1/4-the-brain/study-guide/zffu0vU5m7HwEMsU "fv-autolink")'s dopamine activity. They work mainly by blocking dopamine receptors, which calms the symptoms tied to too much dopamine signaling: hallucinations (sensing things that aren't there), delusions (fixed false beliefs), and disordered thinking.

Think of it this way. If too much dopamine is like an alarm blaring nonstop, antipsychotics turn the volume down. The classic example you'll see is **Chlorpromazine** (one of the first ones developed). These drugs sit on the biological side of treating disorders, the idea that mental illness has roots in [brain](/ap-psych-revised/unit-1/2-overview-of-the-nervous-system/study-guide/4EFLv8T9ARX14r9M "fv-autolink") chemistry and can be addressed by changing that chemistry directly. They're great at quieting *positive* symptoms (the added-on stuff like hallucinations), but they don't always do much for *negative* symptoms like flat emotion or social withdrawal.

## Why It Matters

This term lives in Unit 8, specifically Topic 8.9 (Treatment of Disorders from the [Biological Perspective](/ap-psych-revised/key-terms/biological-perspective "fv-autolink")), with a foot in Topic 8.8 (Psychological Perspectives and Treatment of Disorders). It's the go-to example of the biomedical approach: instead of talk therapy, you change the brain's chemistry. Knowing antipsychotics lets you contrast the biological perspective against psychological ones like [cognitive-behavioral therapy](/ap-psych-revised/unit-5/5-treatment-of-psychological-disorders/study-guide/ZL6wEJsAunnbNYtj "fv-autolink"), which is exactly the kind of compare-and-contrast AP Psych loves. The dopamine link also ties treatment back to the biological causes of schizophrenia, so this one term connects symptoms, neurotransmitters, and treatment in a single thread.

## Connections

### [Dopamine (Unit 8)](/ap-psych-revised/key-terms/dopamine)

Antipsychotics work by blocking [dopamine](/ap-psych-revised/key-terms/dopamine "fv-autolink") receptors, so the drug and the neurotransmitter are basically a package deal. The dopamine hypothesis of schizophrenia (too much dopamine activity drives the symptoms) is the whole reason these drugs target dopamine in the first place.

### Hallucinations and Delusions (Unit 8)

These are the positive symptoms of schizophrenia that antipsychotics are best at reducing. If a question describes a patient who stops hearing voices after starting medication, that's antipsychotics quieting dopamine-driven [hallucinations](/ap-psych-revised/key-terms/hallucinations "fv-autolink").

### Cognitive-Behavioral Therapy (Unit 8)

This is the psychological-perspective counterpart to a biological treatment. AP loves contrasting the two: antipsychotics change brain chemistry directly, while CBT changes how a person thinks and behaves, and serious cases often combine both.

### [Anti-anxiety Drugs (Unit 8)](/ap-psych-revised/key-terms/anti-anxiety-drugs)

Both are biomedical treatments, but they target different things. [Anti-anxiety drugs](/ap-psych-revised/key-terms/anti-anxiety-drugs "fv-autolink") calm overactive arousal for anxiety disorders, while antipsychotics block dopamine for psychotic disorders. Don't mix up which drug class treats which disorder.

## On the AP Exam

Expect this on multiple-choice questions in Unit 8. A common stem asks which neurotransmitter antipsychotics target (answer: dopamine) or how a drug like Chlorpromazine helps someone with schizophrenia (it reduces positive symptoms by blocking dopamine receptors). Another favorite tests side effects: if a patient on antipsychotics develops muscle rigidity and tremors, that points to motor side effects from blocking too much dopamine. You may also see a critical-thinking angle, like why a clinician might hesitate to use antipsychotics as a first-line treatment, which connects to weighing benefits against side effects. On free response, this term shows up when a prompt asks you to apply a biological treatment or compare biological versus psychological approaches, so be ready to name the drug class, the neurotransmitter, and the symptoms it targets.

## Antipsychotic medications vs Anti-anxiety drugs

Both are biomedical treatments, but they do different jobs. Antipsychotics block dopamine to treat psychotic symptoms like hallucinations and delusions in disorders such as schizophrenia. Anti-anxiety drugs (like benzodiazepines) calm the nervous system to treat anxiety disorders. On the exam, match the drug to the disorder: dopamine and psychosis for antipsychotics, arousal and anxiety for anti-anxiety drugs.

## Key Takeaways

- Antipsychotic medications treat psychotic disorders like schizophrenia by blocking dopamine receptors in the brain.
- They are best at reducing positive symptoms such as hallucinations, delusions, and disordered thinking, and less effective at negative symptoms.
- Chlorpromazine is the classic example you should be able to name.
- Side effects like muscle rigidity and tremors come from blocking too much dopamine, which affects movement.
- Antipsychotics represent the biological (biomedical) perspective on treatment, in contrast to psychological approaches like CBT.
- The whole approach rests on the dopamine hypothesis: excess dopamine activity is linked to schizophrenia's symptoms.

## FAQs

### What are antipsychotic medications in AP Psych?

They're drugs that treat psychotic disorders like schizophrenia by blocking dopamine receptors in the brain, which reduces hallucinations, delusions, and disordered thinking. Chlorpromazine is the classic example you'll see on the exam.

### Which neurotransmitter do antipsychotic drugs target?

Dopamine. Antipsychotics work by blocking dopamine receptors, which lowers the dopamine activity linked to schizophrenia's positive symptoms like hallucinations and delusions.

### Do antipsychotics cure schizophrenia?

No. They manage symptoms (especially positive ones like hallucinations) but don't cure the disorder, and they often do little for negative symptoms like social withdrawal. That's one reason some clinicians hesitate to use them as the only first-line treatment.

### How are antipsychotic drugs different from anti-anxiety drugs?

Antipsychotics block dopamine to treat psychotic disorders like schizophrenia. Anti-anxiety drugs calm the nervous system to treat anxiety disorders. Match the drug to the disorder: dopamine and psychosis versus arousal and anxiety.

### What do muscle rigidity and tremors mean in someone taking antipsychotics?

They're motor side effects caused by blocking too much dopamine, which is also involved in movement control. On the exam, this scenario points you toward identifying side effects of antipsychotic treatment.

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