A nurse is collecting data from a client who is receiving multiple antipsychotic medications. The client exhibits muscle rigidity, hyperpyrexia, and diaphoresis. The nurse should identify that the client may be experiencing which of the following adverse effects?

Choice A reason: Neuroleptic malignant syndrome is a life-threatening reaction to antipsychotics characterized by muscle rigidity, high fever, and autonomic instability such as diaphoresis. Choice B reason: Acute dystonia involves muscle spasms, usually of the face or neck, but not hyperpyrexia or diaphoresis. Choice C reason: Tardive dyskinesia involves involuntary repetitive movements, often of the mouth or tongue, not systemic symptoms. Choice D reason: Pseudoparkinsonism mimics Parkinson’s disease with tremors and rigidity but does not include hyperpyrexia or diaphoresis.