My INR was 5.4 on Monday.. nurse said take 5 mg. for two nights instead of my usual 10 mg. Some of you on here advised me to cut it in half for one night only, and last night I lingered a minute, but ended up cutting the 10 in half and took 5. So, went back today and protime was 2.4 (my range is 2.5-3.5) and now I am really nervous that tomorrow it will be even lower, since I just took the 5 last night..? I haven't heard back from the coumadin mgr. yet, just got back home but now pretty worried about tomorrow.