Marzog Saeed AL Nasser*,Ahmed S Ali,Mai A Abdul Sattar,Ezz H Abdulfattah,Lateef M Khan,Khalid Abdullah Al-Alsheikh
Background: Tacrolimus is immunosuppressive agent used for the prevention of rejection in kidney transplant patients, has narrow therapeutic range, and variable pharmacokinetics. Objectives: To identify the optimum Tacrolimus blood trough level for Saudi kidney transplant patients (SKTP). Method: The research population consisted of 100 SKTP at the Armed Forces Hospital in the Southern Region (AFHSR) treated with Tacrolimus and followed-up for a period of 24 months (2012 till 2014). Results: A significant relationship between Tacrolimus trough level and incidence of kidney rejection was remarkably found only after 180 days post-transplantation. During this period, Tacrolimus mean trough level (ng/ml) was 7.4 ± 0.2 in SKTP with no rejection, 5.3 ± 0.7 for those with acute rejection, and 3.8 ± 0.4 for those with chronic rejection. Furthermore, the coefficient of variation (CV%) which reflects fluctuation in Tacrolimus trough level, was obviously high in SKTP with acute rejection in all post-kidney-transplant periods. Conclusion: After 6 month post- kidney transplantation in SKTP, Tacrolimus trough level (
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