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Pharmacological TherapiesWatch EPS & metabolic effects

AntipsychoticsNCLEX cheat sheet

Antipsychotics treat schizophrenia, psychosis, and bipolar mania by blocking dopamine.

21 key facts 5 practice questions Reviewed Oct 2026
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Types

  • Typical: haloperidol → ↑EPS risk
  • Atypical: -apine/-idone → metabolic
  • Block dopamine D2 receptors

Eps

  • Acute dystonia → give benztropine
  • Akathisia = restless pacing
  • Tardive dyskinesia = lip smacking

Report

  • NMS: high fever, rigid, ↑CK
  • Clozapine → agranulocytosis, monitor WBC

Teach

  • Rise slowly → orthostatic ↓BP
  • Weight, glucose, lipids checks
Red flag to remember

Neuroleptic malignant syndrome (high fever, rigidity, altered consciousness, unstable vitals) is a medical emergency requiring the drug to be stopped immediately.

Before you read

Test yourself first: 5 questions

Question 1 of 5

A nurse is teaching a client and family about the difference between typical and atypical antipsychotics. Which statement by the family member indicates correct understanding?

What is antipsychotics?

Typical (first-generation) agents like haloperidol cause more extrapyramidal symptoms, while atypical (second-generation) agents like risperidone and olanzapine cause more metabolic effects. The most dangerous adverse effect is neuroleptic malignant syndrome. Memory aid: typicals cause movement problems (EPS), atypicals cause metabolic weight/sugar problems.

Key points to remember

  • Extrapyramidal symptoms (EPS) include acute dystonia, akathisia (restlessness), pseudoparkinsonism, and tardive dyskinesia (often irreversible involuntary movements).
  • Neuroleptic malignant syndrome (NMS) is a life-threatening reaction with high fever, severe muscle rigidity, altered mental status, and autonomic instability.
  • Atypical agents commonly cause weight gain, hyperglycemia, and elevated lipids (metabolic syndrome).
  • Clozapine carries a risk of agranulocytosis, requiring regular white blood cell and absolute neutrophil count monitoring.
  • Anticholinergic effects (dry mouth, constipation, urinary retention, blurred vision) and orthostatic hypotension are common.
  • Full therapeutic effect on psychotic symptoms may take several weeks.

Nursing priorities

  1. Assess for extrapyramidal symptoms and abnormal involuntary movements (such as with the AIMS scale).
  2. Monitor temperature, vital signs, and muscle tone for signs of neuroleptic malignant syndrome.
  3. Monitor weight, blood glucose, and lipids, especially with atypical agents.
  4. Monitor WBC and ANC for patients on clozapine and report drops promptly.
  5. Implement fall precautions for orthostatic hypotension and treat anticholinergic effects.

Labs & values

WBC (5,000-10,000/mm3) and ANC for clozapine - agranulocytosis
Blood glucose (fasting70-99 mg/dL)
Lipid panel for atypical agents

Patient teaching

  • Rise slowly to avoid dizziness, and do not stop the medication abruptly.
  • Report fever, muscle stiffness, sore throat, or abnormal movements right away.
  • Use sunscreen due to photosensitivity, and attend all blood-monitoring appointments if on clozapine.

Red flags: report now

  • Neuroleptic malignant syndrome (high fever, rigidity, altered consciousness, unstable vitals) is a medical emergency requiring the drug to be stopped immediately.
  • Acute dystonia such as muscle spasms of the neck, jaw, or back, or oculogyric crisis.
  • Signs of agranulocytosis in clozapine patients such as sore throat, fever, and infection.
  • Tardive dyskinesia, which may be irreversible, requires prompt provider notification.

References

Clinical references for this topic

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