Final answer:
The regions of the nervous system likely to be affected by haloperidol side effects are the basal nuclei and the extrapyramidal system. Adverse reactions to the drug can include hyperthermia, muscular rigidity, diaphoresis, and redness at the site of injection.
Step-by-step explanation:
The regions of the nervous system that are likely to be the focus of haloperidol side effects are the basal nuclei and the extrapyramidal system. Haloperidol affects dopamine activity, which is a prominent part of the chemistry of the basal nuclei. Adverse reactions to the drug can include hyperthermia, muscular rigidity, diaphoresis, and redness at the site of injection. These findings indicate that the client is experiencing an adverse reaction to the drug.