I had my kidney transplant Oct 09 and had been on prograf from that time until about two months ago when my pharmacy started me on tracrolius. Blood test a month ago showed a very low prograf level. I thought it was because I had confused the prograf and cellcept. My last lab test on Friday and reviewed today shows that I have a prograf level of zero. Panic time as I am not ure I convined my doctor that I am taking the meds a prescribed. Anyone else had similar problems?