Case Presentation: A 38-year-old female presented to the emergency department with profuse vomiting, fever, chills, lightheadedness, dizziness, and the inability to tolerate oral intake. She had been in her usual state of health until two hours after returning from a doctor’s appointment where she received methylene blue intravenously. Past history included hypothyroidism, postural orthostatic tachycardia [...]

Case Presentation: A 66-year-old man with history of atrial fibrillation, heart failure, hepatocellular carcinoma (HCC), bipolar disorder, and gout presented with lightheadedness and a syncopal episode with tremulousness and confusion. His reported medications included apixaban, carvedilol, risperidone, and allopurinol. Vitals were notable for tachycardia but otherwise normal. Physical exam was notable for irregularly irregular heart [...]