The patient is being treated with intravenous quinidine for malaria that was contracted while in Africa. Several hours after administration of the medication, the patient develops palpitations and dizziness. Electrocardiogram shows tachycardia and twisting of the QRS complexes around an isoelectric line. Which best describes the most likely etiology of this patient’s arrhythmia?

The patient is a 5-year-old boy who presents with anticholinergic toxicity and has been prescribed physostigmine 0.02 mg/kg q10min until the patient’s heart rate drops to 100 beats per minute. The patient’s heart rate is 132 bpm and he weighs 42 pounds. It takes 40 minutes after the first dose for the patient’s heart rate to decrease to 100 bpm. How much total physostigmine, in mg, does the nurse administer? Input your answer to the nearest hundredth decimal place.

The nurse is caring for a patient newly diagnosed with tuberculosis. Which medication(s) will the nurse most likely administer to this patient for his condition? Select all that apply.