His PT is 17.60, his doctor will only give him a dosage of 5mg or 7.5mg, nothing in-
between. If the labs are close to the 2 for the INR he will still give him 7.5mg and then it is too high 3.75 on his next. I just don't know why he can't take 6mg if his INR
is 1.61 instead of 7.5.