i have a mechanical aortic heart valve and take warfarin. my last inr check was 3.5, right in the middle of my range. two days ago i began a 6-day decreasing dosage of methylprednisolone 4mg. on day 1 i took 6tabs....on day 2 i took 5-tabs....i m on day 3 where i ll take 4-tabs,,,,,,,etc. will this medicine make my inr higher, lower or no meaningful change?