If you take Coumadin, testing your PT/INR levels regularly is important. PT/INR Self Testing is fast and can be done at home or when you travel. “In 2012, Advanced Cardiovascular Associates, PLC., partnered with Real-Time Diagnostics (RTD) for INR Management of our long-term Coumadin therapy patients. WARNING. BLEEDING RISK. COUMADIN can cause major or fatal bleeding [see WARNINGS AND PRECAUTIONS]. Perform regular monitoring of INR in all treated patients [see DOSAGE AND ADMINISTRATION]. What is PT, PTT, INR and how does aspirin effect these levels??? - Answered by a verified Health Professional Testing your PT/INR at home is easy. We provide you with the same INR Monitor and test strips that doctors and nurses use in their offices. After you receive simple one-on-one training from your doctor, nurse, or from one of our certified trainers, you begin home testing. A prothrombin time (PT) is a test used to help detect and diagnose a bleeding disorder or excessive clotting disorder; the international normalized ratio (INR) is calculated from a PT result and is used to monitor how well the blood-thinning medication (anticoagulant) warfarin (Coumadin®) is working to prevent blood clots. What is PT/INR Home Testing? As a Coumadin ® patient you now have the option of checking your PT/INR at home, at anytime. Testing at home is a convenient alternative to going to your doctor’s office to check your INR levels, and frequent self-testing has been proven to reduce the risk of bleeding and clotting. Can high coumadin levels or high PT/INR cause confusion, slurred speech and eventual passing out? Asked 18 Oct 2010 by jeepdoc513 Updated 22 December 2016 Generally when a person is on Coumadin, the Dr is looking for an INR range of 2-4 depending on what you are taking it for. That is a very general range. “In 2012, Advanced Cardiovascular Associates, PLC., partnered with Real-Time Diagnostics (RTD) for INR Management of our long-term Coumadin therapy patients.