Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
An antipsychotic drug is a medication primarily used to manage symptoms of psychosis, such as delusions or hallucinations. These drugs work by blocking dopamine receptors in the brain.
Dopamine is a neurotransmitter involved in reward-motivated behavior and pleasure. Overactivity of dopamine has been linked to psychotic disorders such as schizophrenia.
Psychosis refers to severe mental disturbances characterized by impaired thinking, false beliefs (delusions), and sensory perceptions without external stimuli (hallucinations).
Side effects are unintended consequences or reactions that may occur when taking medications. Common side effects of antipsychotic drugs include drowsiness, weight gain, and movement disorders.