ArticlePharmacology research & perspectives2026
Drug-Induced Liver Injury During Treatment With Tocilizumab: A Case Report of an Atypical Pattern Lesion.
Article in Pharmacology research & perspectives, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Tocilizumab is an interleukin-6 (IL-6) receptor antagonist indicated for various rheumatologic conditions. While hepatotoxicity is a recognized adverse effect, it predominantly manifests as hepatocellular injury. We report a rare case of drug-induced liver injury (DILI) presenting with a cholestatic pattern and cholangitis features in a 75-year-old patient treated for giant cell arteritis. Following the third tocilizumab infusion, the patient developed jaundice and abdominal pain. Laboratory investigations revealed a cholestatic pattern of liver injury (ALT/ALP (R) ratio ≤ 2) with marked cholestasis. Imaging findings raised suspicion for cholangitis. After ruling out infectious, autoimmune, and metabolic aetiologies, a liver biopsy confirmed neutrophilic cholangitis and marked intrahepatic and sinusoidal cholestasis. Drug discontinuation, along with ursodeoxycholic acid treatment, led to clinical and biochemical resolution. This case is notable as tocilizumab-induced liver injury rarely presents with cholangitic features. The pathophysiology may involve the disruption of IL-6 signaling, which plays a pivotal role in maintaining biliary epithelial integrity. Clinicians should be vigilant for this atypical cholestatic presentation to ensure prompt drug withdrawal.
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