I know with me the first year they were testing my tacrolimus very often. Daily the first month it seemed and even now I'm 14 months post i get tested at least once a month. So are they testing you frequently? I had a Heart transplant and they like my levels about 8-10 so how long ago was your transplant and whet is your level. I probably have had my dose changed at least 30-40 times. I know some of the other meds i was on also affect the tacro level.