End
1 :

Hint : Antipsychotic + rigidity + high fever = NMS

Correct Answers:

  • Neuroleptic malignant syndrome... immediately notify the health care provider.


Rationale :

🟣 Neuroleptic Malignant Syndrome (NMS) is a rare but life-threatening reaction to antipsychotic medications such as risperidone, caused by acute dopamine receptor blockade in the central nervous system.

🟣 The client’s progression from severe muscle rigidity to hyperthermia (102.8°F), tachycardia, hypertension, tachypnea, diaphoresis, drooling, and dysphagia reflects classic autonomic instability and lead-pipe rigidity, hallmark findings of NMS.

🟣 The timeline of worsening symptoms over several hours strongly supports a systemic toxic reaction rather than a simple extrapyramidal side effect.

🟣 The most appropriate immediate action is to notify the health care provider at once because the medication must be discontinued immediately, and emergency treatment such as dantrolene, bromocriptine, IV fluids, and cooling measures may be required.

🟣 Without rapid intervention, NMS can progress to rhabdomyolysis, renal failure, dysrhythmias, and cardiovascular collapse, making early recognition and escalation of care critical.

❌ Hypertensive crisis

A blood pressure of 150/90 mm Hg does not meet the criteria for hypertensive crisis, which typically involves readings above 180/120 mm Hg. Hypertensive crisis also does not present with severe muscle rigidity, hyperthermia, or drooling.

❌Tardive dyskinesia

Tardive dyskinesia causes involuntary repetitive movements such as lip smacking or tongue protrusion, not sustained muscle rigidity or high fever. Diphenhydramine is used for acute dystonia, not for tardive dyskinesia or systemic toxicity.

❌Agranulocytosis

Agranulocytosis results in severe neutropenia and increased infection risk, often presenting with fever and sore throat. It does not cause profound muscle rigidity or autonomic instability.


Distractor Analysis :

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