Enteral Feeding Tube Administration of Oral Sirolimus Tablets in a Critically Ill Adult

Sirolimus is an immunosuppressive agent for solid organ transplant recipients and is commercially available as an oral tablet and liquid solution. Current package labeling does not support crushing tablets for administration via feeding tubes. A 72 year old white male presented to the trauma intensive care unit after a motor vehicle crash with a reported history of an orthotopic cardiac transplantation on maintenance sirolimus and prednisone, both of which were resumed on hospital day 1. During admission, the patient required intubation with placement of a nasogastric tube (NG) due to worsening respiratory status. Sirolimus was subsequently given by crushing the tablet and administering via the NG tube. Prior to sirolimus resumption on hospital day 1, a baseline sirolimus level resulted as 2.4 ng/mL and repeat trough levels of 1.7 ng/mL and 2.1 ng/mL were obtained on hospital days 17 and 24, respectively. The patient was discharged to a long term care facility after placement of a tracheostomy and percutaneous endoscopic gastrostomy (PEG) tube with orders to continue maintenance sirolimus and prednisone administered crushed via PEG tube. This report describes a novel administration method of sirolimus in a critically ill adult with detectable sirolimus levels throughout admission. This administration technique appears to be safe and warrants further investigation as a potentially efficacious alternative to standard oral administration.