Sitting in our Cardio's Office yesterday..waiting for Hubby's rountine follow-up for b/P meds..I noticed that they had posted signs all over..saying, that the flu shot will elevate your INR..and you must come back in 2 weeks for a follow-up on your INR....I never got mine this year or last year..I have a PCP appointment on Jan. 13th..Probably, too late by then....Will hope I don't get the flu..Never have..just the common cold..... I home test..so, if I get one in Jan .will check it out (INR)..Bonnie