A nurse is caring for a client who has schizophrenia and is taking haloperidol. The nurse should monitor for which of the following adverse effects of haloperidol?

Choice A reason: Fever can occur in rare cases of neuroleptic malignant syndrome, but it is not the most common adverse effect of haloperidol. Choice B reason: Intractable hiccups are not associated with haloperidol use. They are not a recognized adverse effect of this medication. Choice C reason: Excessive salivation is more commonly linked to medications like clozapine, not haloperidol. Choice D reason: Extrapyramidal symptoms (EPS) are the most common adverse effects of haloperidol. These include dystonia, akathisia, parkinsonism, and tardive dyskinesia. EPS result from dopamine blockade in the nigrostriatal pathway and require close monitoring and management.