A client on antipsychotic therapy develops muscle rigidity, high fever, tachycardia, fluctuation in BP, diaphoresis, and rapid deterioration of mental status to stupor and coma. These signs and symptoms are indicative of?

Appeared in: JSSH Staff Nurse - 2019

Explanation

The patient's symptoms—high fever, severe muscle rigidity, autonomic instability (tachycardia, fluctuating BP, diaphoresis), and altered mental status—constitute the classic tetrad of Neuroleptic Malignant Syndrome (NMS).
NMS is a rare but life-threatening medical emergency caused by an adverse reaction to antipsychotic (neuroleptic) drugs.
The rapid onset and combination of these specific systemic symptoms strongly point to NMS over other potential side effects, which are typically less severe and do not involve hyperthermia and autonomic collapse.

Why Other Options Were Wrong

Option A: Tardive dyskinesia involves involuntary, repetitive movements (e.g., lip-smacking, grimacing) and is a long-term side effect. It does not present with fever, severe rigidity, or acute autonomic collapse.
Option C: This is a broad category of movement disorders. While it includes rigidity (parkinsonism), NMS is a much more severe, specific syndrome that also involves hyperthermia and severe autonomic dysfunction, which are not typical of general EPS.
Option D: This is a specific type of acute dystonia (an EPS) characterized by a prolonged, involuntary upward deviation of the eyes. It does not involve the systemic symptoms of fever, widespread rigidity, and autonomic instability.

Related Visual

Clinical Relevance

Nursing practice connection: Knowing Recognition of life-threatening adverse effects of antipsychotic medications helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Recognizing NMS is a critical nursing responsibility as it is a medical emergency with a mortality rate of 10-20% if not treated promptly.
Immediate nursing action involves stopping the causative agent, notifying the provider, and initiating supportive cooling and hydration measures to prevent complications like renal failure and cardiovascular collapse.
What if? If the patient only presented with a shuffling gait and a fine tremor a week after starting haloperidol, the most likely diagnosis would be medication-induced parkinsonism (an EPS), which is managed differently (e.g., with anticholinergics like benztropine) and is not a medical emergency like NMS.

How to Approach the Question

First, identify the drug class mentioned in the scenario: antipsychotic therapy.
Next, analyze the cluster of symptoms presented: muscle rigidity, high fever, tachycardia, fluctuating BP, diaphoresis, and altered mental status.
Recognize that this specific combination of severe symptoms points to a systemic, life-threatening syndrome rather than isolated or less severe side effects.
Evaluate the options by differentiating between long-term effects (Tardive Dyskinesia), broader categories (Extrapyramidal Symptoms), specific focal symptoms (Oculogyric Crisis), and acute, systemic syndromes (NMS).
Match the classic tetrad of hyperthermia, rigidity, autonomic instability, and altered mental status to Neuroleptic Malignant Syndrome to select the correct answer.

Concept Tested & Keywords

Concept Tested: Recognition of life-threatening adverse effects of antipsychotic medications.
Stem keywords: antipsychotic therapy, muscle rigidity, high fever, tachycardia, fluctuation in BP, diaphoresis, stupor, coma
Lead-in keywords: indicative of
Negative lead-in flag: false

Question ID

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Reference Book

E6 Pharmacology Nursing Lilley 11e Part 1 p. 281-283

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 10037-10039

E6 Kaplan Sadock's Synopsis of Psychiatry-2022 (pp 1-3768 of 3768) p. 1885-1887

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