Sublingual Administration of Tacrolimus is Safe and Provides Similar Drug Exposure to Per-oral Route in Liver Transplant Recipients During Early Postoperative Period-A Large, Retrospective, Observational Study.

Background/aims: Per-oral (PO) administration of tacrolimus (TAC) results in inadequate trough levels in the early postoperative period in liver-transplant (LT) recipients who undergo Roux-en-Y hepaticojejunostomy for biliary reconstruction. Sublingual administration (SL) of tacrolimus provides an alternative route in such patients.The objectives of this study were to assess the feasibility and safety of SL tacrolimus in adult LT-recipients in the early postoperative period and to compare therapeutic efficacy of SL administration of tacrolimus versus PO route.