Tomás, a 34-year-old man with schizophrenia, has been taking haloperidol 5 mg orally twice daily for the past three weeks. During a routine outpatient follow-up, he reports feeling restless and unable to sit still since starting the medication. The nurse observes him shifting his weight from foot to foot and pacing the hallway. Which adverse effect of haloperidol is the nurse most likely observing?
- Akathisia
- Tardive dyskinesia
- Neuroleptic malignant syndrome
- Acute dystonia