Overview Buphenyl Therapy for Byler's Disease Status: No longer available Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary This is a single patient compassionate use protocol to determine whether Buphenyl (4-phenylbutyrate) will improve the poor bile flow associated with Byler Disease. Details Lead Sponsor: University of PittsburghTreatments: 4-phenylbutyric acid