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International normalized ratio (INR) is a calculation made to standardize prothrombin time. INR is based on the ratio of the patient's prothrombin time and the normal mean prothrombin time. Prothrombin time is a test to learn how fast the blood clots in patients receiving oral anticoagulant medication. This test may be used in patients with prosthetic heart valves, venous thromboembolism, or antiphospholipid syndrome[1][2][3][4][5][6][7][8][9]. A blood sample is collected for this test[6][9].
Helpful, trusted answers from doctors: Dr. Garcia on foods avoid blood thin: The INR is a measure of how thin your blood is. When alcohol effects your INR it is causing your blood to become more thin. A low INR means that your blood is thicker. A high INR means your blood is thinner. If your INR is too low i.e. Too thick i.e. Not anticoagulated, then there are treatment options to anticoagulate including an injectable medications.