Possible Hepatotoxicity Associated With Daptomycin

Purpose To report a case of isolated daptomycin-induced acute liver injury without elevations in creatine kinase (CK) levels or kidney dysfunction. Summary A 49-year-old female with a history of pancreatitis, lupus, diabetes, congestive heart failure, hypertension, and chronic pain syndrome presented to the emergency department with alteration in mental status and acute liver failure. The patient had been treated with daptomycin for methicillin-resistant Staphylococcus aureus (MRSA) endocarditis for 3 weeks. After ruling out other possible etiologies, daptomycin was suspected as a cause of acute liver failure. Her liver failure resolved gradually following withdrawal of daptomycin. Conclusion Although hepatic abnormalities caused by daptomycin are rare, a handful of cases with daptomycin-induced liver injury have been reported in the literature. Of note, in most cases, patients on daptomycin therapy developed liver damage with elevations in CK levels. Our case report suggests possible severe liver injury associated with high-dose and long-term daptomycin treatment in the absence of rhabdomyolysis. Future research is warranted to further investigate the relationship between daptomycin use and liver injury, yet it is reasonable to monitor liver function tests at baseline and weekly thereafter along with CK levels, especially in patients requiring long-term daptomycin therapy.