A patient on haloperidol develops fever, lead-pipe rigidity, altered mental state and raised creatine kinase. What is the diagnosis?

Answer and explanation

Correct answer: C. Neuroleptic malignant syndrome

  1. Step 1: NMS is a life-threatening reaction to dopamine antagonists.
Answer
Neuroleptic malignant syndrome.
Why not the others: Dystonia is brief and does not cause fever.

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