Tacrolimus Level

FK506 Tacrolimus Trough
EDTA whole blood µg/L (ng/mL)

About this test

Calcineurin inhibitor used in organ transplantation. Trough level (pre-dose, whole blood). Target varies by organ, time post-transplant, and centre protocol.

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs 5 – 15 Typical renal transplant maintenance target; varies by protocol

Clinical Interpretation

Low / Decreased
Subtherapeutic — rejection risk.
High / Increased
Toxicity — nephrotoxicity, neurotoxicity, hypertension, diabetes, infections.

Related Tests

Specimen
EDTA whole blood
Reporting Unit
µg/L (ng/mL)

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.