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  • Title: Once-daily prolonged release tacrolimus in liver transplantation: Experts' literature review and recommendations.
    Author: Coilly A, Calmus Y, Chermak F, Dumortier J, Duvoux C, Guillaud O, Houssel-Debry P, Neau-Cransac M, Stocco J.
    Journal: Liver Transpl; 2015 Oct; 21(10):1312-21. PubMed ID: 26264233.
    Abstract:
    The efficacy and safety of tacrolimus (Tac) twice daily (bid) and once a day (qd) formulations are considered to be similar. However, the available information regarding initiation of Tac qd is sparse, and practical information is lacking. On the basis of a literature review, clinical efficacy, and safety trials, French experts in the liver transplantation field were asked to highlight pharmacokinetic (PK) differences between both formulations to assess efficacy and safety of the qd formulation in the context of de novo initiation or conversion and to provide their recommendations for initiation and day-to-day management of Tac qd. The same efficacy and safety profile is found for both immediate-release and prolonged-release Tac. PK differences carry on absorption because of the difference in formulations but not on metabolism or excretion. Tac qd offers a better reproducibility in exposure than Tac bid but is associated with an increased risk of disturbed absorption in case of a change in intestinal motility. The same therapeutic drug monitoring with Tac qd and bid could be applied, based on minimal concentration (trough level; C(min)), as there is a similar strong correlation between C(min) and the area under the curve (AUC) for both formulations. Different protocols for Tac qd initiation were described through numerous studies, except for early conversion: initiation on day 0, using 0.10 to 0.20 mg/kg/day as monotherapy, or lower dosages in case of concomitant immunosuppressant treatment or poor graft quality; early conversion from day 5 to 6 months, preferably before hospital discharge, using a 1 to 1.3 mg/kg/day schedule and with first C(min) assessment 48 hours after the conversion; and later conversion (>6 months posttransplantation) using a milligram-to-milligram dosage schedule, and with dose adjustment based on weekly C(min) measurement. Experts underline that an increase in treatment adherence was expected using Tac qd in liver recipients. In conclusion, Tac qd has the same efficacy and safety profile as Tac bid. De novo introduction or later conversion are well documented but could differ from day-to-day practice.
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