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  • Title: Trough Level and Tacrolimus Variability of Early Converted Once-Daily Tacrolimus: 1-Year Follow-up Study.
    Author: Sukkha S, Suansanae T, Iamrahong P, Wiwattanathum P.
    Journal: Transplant Proc; 2020 Apr; 52(3):775-779. PubMed ID: 32143870.
    Abstract:
    INTRODUCTION: Long-term transplant outcomes are considered a crucial point for kidney transplantation. Follow-up studies in patients receiving early conversion to once-daily tacrolimus (TAC-OD) are still limited. We aimed to investigate tacrolimus trough level (Cmin), intrapatient variability of tacrolimus dose-normalized Cmin (TAC-Cmin/D), along with other outcomes between twice-daily tacrolimus (TAC-BID) and early converted TAC-OD. MATERIAL AND METHODS: This study was a single center, retrospective, cohort study. All new kidney transplant patients who received tacrolimus and presented an estimated glomerular filtration rate of more than 45 mL/min/1.73 m2 on the day of hospital discharge were included. Studied patients were divided into the standard TAC-BID and patients who were converted from TAC-BID to TAC-OD on the day of hospital discharge. We followed patients for 1 year after transplantation. RESULTS: At the first follow-up visit, Cmin of TAC-OD was significantly lower than that of TAC-BID. However, Cmin and estimated glomerular filtration rate were comparable between TAC-BID and TAC-OD throughout 1-year follow-up. TAC-OD also provided a lower intrapatient variability of TAC-Cmin/D compared with TAC-BID when observed after 6 months post transplantation (17.40% and 23.27% for TAC-OD and TAC-BID, respectively; P = .13). The renal function, as well as other adverse outcomes, was similar between 2 formulations. DISCUSSION: TAC-OD provided a similar Cmin with comparable renal function compared with TAC-BID during 1-year follow-up. In addition, TAC-OD is likely to have a benefit of a lower intrapatient variability of tacrolimus. CONCLUSION: Early conversion from TAC-BID to TAC-OD with 1:1 ratio can be used with close long-term monitoring.
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