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Related Concept Videos

Psychosis and Antipsychotic Drugs: Overview01:28

Psychosis and Antipsychotic Drugs: Overview

The term "psychosis" refers to a spectrum of mental disorders characterized by abnormal thoughts, perceptions, and behaviors. It can manifest as mood disorders, dementia, delirium with psychotic features, substance-induced psychosis with psychotic features, brief psychotic disorder, delusional disorder, schizoaffective disorder, and schizophrenia. Among all these disorders, schizophrenia is the most common psychotic disorder, affecting 1% of the worldwide population. Psychotic symptoms in all...
Drug Therapy01:28

Drug Therapy

The advent of drug therapy has profoundly shaped modern mental health care, providing targeted treatments for a range of psychological disorders. Psychotherapeutic drugs, classified into antianxiety, antidepressant, and antipsychotic medications, address symptoms across anxiety disorders, mood disorders, and schizophrenia. While these medications have transformed patient outcomes, they require careful management due to their potential side effects and limitations.
Antianxiety Medications
Psychosis: Goals of Pharmacotherapy01:26

Psychosis: Goals of Pharmacotherapy

Antipsychotic drugs are a crucial treatment method for acute and chronic psychoses, bipolar illness, and behavioral disorders. The selection of these drugs depends on several factors, including the state of the disease, clinical judgment, possible drug interactions, and the patient's sensitivity to adverse effects. In immediate scenarios, such as delirium and dementia, short-term treatment with low doses of high-potency typical or atypical agents can effectively manage symptom exacerbation. For...
Antipsychotic Drugs: Typical and Atypical Agents01:21

Antipsychotic Drugs: Typical and Atypical Agents

Antipsychotic drugs are classified into first-generation (typical) drugs including phenothiazines; and second-generation (atypical) drugs. Chlorpromazine hydrochloride (Thorazine), a phenothiazine derivative, broadly impacts the central, autonomic, and endocrine systems. This drug, along with typical agents like haloperidol (Haldol), primarily works by antagonizing D2 receptors, thus reducing dopaminergic neurotransmission. However, typical antipsychotics can cause side effects such as sedation...
Antipsychotic Drugs: Therapeutic Uses and Side Effects01:21

Antipsychotic Drugs: Therapeutic Uses and Side Effects

Antipsychotic drugs primarily block dopamine and serotonin receptors and cholinergic, adrenergic, and histaminergic receptors, thereby reducing hallucinations and delusions in conditions like schizophrenia. However, they can trigger unwanted extrapyramidal effects such as dystonias, Parkinson-like symptoms, and tardive dyskinesia.
Despite these side effects, antipsychotics are used therapeutically for various purposes, including managing schizophrenia, preventing nausea and vomiting, curbing...
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within the...

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Related Experiment Video

Updated: Jul 2, 2026

Development of a Virtual Reality Assessment of Everyday Living Skills
10:32

Development of a Virtual Reality Assessment of Everyday Living Skills

Published on: April 23, 2014

Emerging drugs for schizophrenia.

Ofer Agid1, Shitij Kapur, Gary Remington

  • 1Centre for Addiction and Mental Health, Schizophrenia Program, Department of Psychiatry, University of Toronto, 250 College Street, Toronto, Ontario M5T 1R8, Canada. ofer_agid@camh.net

Expert Opinion on Emerging Drugs
|September 4, 2008
PubMed
Summary

Newer antipsychotics for schizophrenia offer modest benefits, primarily reducing motor side effects. Clozapine remains the most effective treatment for refractory schizophrenia, with dopamine D2 blockade crucial for response.

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Area of Science:

  • Psychiatry
  • Pharmacology

Background:

  • Schizophrenia is a chronic psychiatric disorder requiring lifelong treatment.
  • Atypical antipsychotics have largely replaced typical antipsychotics in Western markets over the past 15 years.
  • Substantial data and prescribing experience are now available for review.

Purpose of the Study:

  • To evaluate the gains and lessons learned from the introduction of atypical antipsychotics.
  • To assess the clinical benefits and limitations of newer antipsychotic medications.
  • To examine the mechanistic underpinnings of antipsychotic response.

Main Methods:

  • Literature review of medical databases including MEDLINE, EMBASE, Cochrane Database.
  • Inclusion of data from ClinicalTrials.gov and schizophreniaforum.org.
  • Analysis of available prescribing experience and substantial data.

Main Results:

  • The clinical benefits of second-generation antipsychotics are modest, with reduced motor side effects as the primary advantage.
  • Evidence supporting a primary effect of atypical agents on negative and cognitive symptoms is limited.
  • Clozapine demonstrates superior efficacy in treating refractory schizophrenia compared to other atypical antipsychotics.

Conclusions:

  • Dopamine D2 receptor blockade appears necessary and potentially sufficient for antipsychotic response.
  • Other receptor interactions may play a role in antipsychotic mechanisms, but are not fully understood.
  • While newer agents offer benefits, clozapine remains a key treatment for specific patient populations.