Tacrolimus - Drug Assay

A Tacrolimus Drug Assay is a critical Therapeutic Drug Monitoring (TDM) blood test used to measure the exact concentration of tacrolimus (also known as FK506 or brand names like Prograf) in your body. Tacrolimus is a highly potent immunosuppressive drug commonly prescribed after an organ transplant (such as kidney, liver, heart, or lung) to prevent the body immune system from rejecting the new organ.

Because it has a narrow therapeutic index (meaning the window between an effective dose and a dangerous dose is very small), regular testing is vital to keep you safe and your new organ healthy.