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  • Title: Relationship of whole-blood FK506 concentrations to rejection and toxicity in liver and kidney transplants.
    Author: Hedayat S, Kershner RP, Su G.
    Journal: J Biopharm Stat; 1996 Nov; 6(4):411-24. PubMed ID: 8969977.
    Abstract:
    FK506 (tacrolimus) has been shown to be a safe and effective immunosuppressant for the prevention of organ rejection after liver and kidney transplantation. Like cyclosporine, the use of FK506 has been associated with some adverse effects such as toxicity and organ rejection. Therapeutic monitoring of the whole-blood FK506 drug concentrations has been used in an effort to determine how the concentration of FK506 in the blood is related to the development of toxicity or the risk for organ rejection. Cox regression analysis of two recent clinical trials of FK506 in patients receiving kidney and liver transplants shows a significant correlation between the whole-blood FK506 concentrations and the incidence of both toxicity and organ rejection. Because of these relationships and the pharmacokinetics of FK506, therapeutic monitoring of the whole-blood FK506 levels is expected to be helpful for minimizing the risks of both toxicity and rejection in liver and kidney transplants.
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