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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.
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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...
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Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
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Author Spotlight: Studying Drug Impacts on Brain Signals Using Dual LFP Recording Protocol in Mice
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Clozapine-associated cardiac dysfunction during a gastroenteritis outbreak.

Anthony M Szema1, Charles Marboe2, Paul Fritz3

  • 1Department of Medicine and Occupational Medicine, Epidemiology, and Prevention, Hofstra Northwell School of Medicine, Hofstra University, Hempstead, NY, USA; threevillageallergyandasthma@gmail.com.

Journal of Community Hospital Internal Medicine Perspectives
|December 18, 2016
PubMed
Summary

Clozapine initiation for psychosis during gastroenteritis outbreaks may trigger severe myocarditis, even at standard doses. Physicians should monitor patients closely, particularly those with diarrhea, due to potential cardiac risks.

Keywords:
adverse reactionallergycardiogenic shockclozapinedeatheosinophilic myocarditisgastroenteritisleft ventricular assist

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Area of Science:

  • Cardiology
  • Psychiatry
  • Infectious Disease

Background:

  • Clozapine is an effective antipsychotic for severe psychosis.
  • Gastroenteritis outbreaks can pose public health challenges.
  • Myocarditis is a known but rare adverse effect of clozapine.

Observation:

  • Two young adult patients developed severe shock and myocarditis shortly after starting clozapine during a hospital gastroenteritis outbreak.
  • Neither patient showed troponin elevation, but both required left ventricular assist device support.
  • Endomyocardial biopsy confirmed lymphocytic myocarditis in one and eosinophilic myocarditis in the other.

Findings:

  • Myocarditis associated with clozapine can occur at usual incipient doses.
  • Gastroenteritis may represent an epidemiologic risk factor for clozapine-induced myocarditis.
  • Patients exhibited persistently elevated white blood cell counts, contrary to expected clozapine effects.

Implications:

  • Physicians must exercise caution when prescribing clozapine, especially in patients with concurrent gastroenteritis or diarrhea.
  • Early recognition and management of myocarditis are critical for patient outcomes.
  • Further research is warranted to understand the interplay between infections and clozapine cardiotoxicity.