To which patient does the nurse most likely anticipate administering total parenteral nutrition (TPN)?

The patient presents to the emergency department with altered mental status and myoclonic jerking. Although the nurse notes that the patient is flushed and his face is red, his skin and mucous membranes are dry and warm to the touch. The nurse also notes decreased bowel sounds and palpates a distended bladder. Vital signs are significant for a temperature of 39.9°C (103.8°F), heart rate of 122 bpm and a blood pressure of 165/92 mm Hg. The nurse prepares to administer which of the following medications to this patient?

The nurse is caring for a patient with schizophrenia who has bacterial endocarditis secondary to intravenous drug use. The patient’s antipsychotic medication is changed from risperidone to clozapine. Within days, the patient develops a serious cardiac arrhythmia. The nurse attributes the patient’s arrhythmia to which cause?