Ertapenem-Induced Liver Enzyme Elevations

Mechanism and Clinical Significance

Transaminase elevations with ertapenem are typically mild to moderate in intensity and are generally transient, may not require special treatment 1
The mechanism is likely related to direct hepatocellular effects, similar to other antibiotics that can cause drug-induced liver injury 2
Most cases of antibiotic-induced liver enzyme elevations resolve with discontinuation of the offending agent 2

For patients receiving ertapenem, monitoring of liver function tests is recommended, particularly in those with pre-existing liver disease or risk factors for hepatotoxicity 2
Any combination of otherwise unexplained nausea, vomiting, and abdominal pain should be evaluated with liver function tests, including ALT, AST, bilirubin, and alkaline phosphatase to assess for possible hepatotoxicity 2
Drug-induced hepatitis should be suspected when ALT levels are ≥3 times the upper limit of normal in the presence of hepatitis symptoms, or ≥5 times the upper limit of normal in the absence of symptoms 2

If significant elevations in liver enzymes occur (≥3 times upper limit of normal), consider temporarily withholding ertapenem and repeating blood work in 2 weeks 2
When abnormalities return to normal, ertapenem may be restarted with close monitoring if clinically indicated 2
Other causes of abnormal liver function tests should be excluded before diagnosing drug-induced hepatotoxicity, including viral hepatitis, biliary tract disease, alcohol use, and other hepatotoxic drugs 2

When evaluating liver enzyme elevations in patients receiving ertapenem, consider the timing of the elevation in relation to drug administration and exclude other potential causes 3