Includes a liver chemistry (SA324), a Complete Blood Count (CBC), a single bile acids, and a phenobarbital level.
Interferences: Marked hemolysis and lipemia. All therapeutic drug monitoring should be submitted as serum in a red top tube. A serum separator tube should not be used in sample collection as the drug concentration being measured may be erroneously decreased by as much as 30% due to binding with gel. Ursodeoxycholic acid may be detected by bile acid assay, causing falsely elevated values.