Black Tarry Stools and Dizziness

George is a 72-year-old male presenting with black tarry stools x 2 days, lightheadedness. 72-year-old male presents with 2-day history of black, tarry, foul-smelling stools. He has had approximately 4-5 such bowel movements. He reports feeling lightheaded especially when standing, and has had one near-syncopal episode. Your task is to take a focused history from this patient.