Very High Warfarin Dosing Requirements in a Patient With Tuberculosis and a Pulmonary Embolism: A Case Report.

To describe a case of significantly increased warfarin requirements in a patient receiving rifampin for the management of tuberculosis. A 76-year-old male was admitted due to altered mentation, cough, and weight loss. He was diagnosed concurrently with tuberculosis and a pulmonary embolism.