Case Presentation: An 88-year-old woman comes to the emergency department with a four-day history of left-sided flank pain associated with nausea and emesis. She has a history of essential hypertension, dyslipidemia, anxiety, and diverticulitis, with a prior history of partial colectomy. For hypertension, she has been on triamterene-hydrochlorothiazide 75 mg-50 mg once daily for several [...]