Can drug‑induced liver injury cause fever?

Can Drug-Induced Liver Injury Cause Fever?

Yes, drug-induced liver injury (DILI) can cause fever, particularly in cases involving hypersensitivity reactions, occurring in approximately 30% of patients with AIH-like DILI. 1

Clinical Presentation of Fever in DILI

Fever is a recognized manifestation of DILI, particularly when the injury involves an immunologic or hypersensitivity mechanism. The evidence demonstrates that:

• Approximately 30% of DILI patients display signs of drug hypersensitivity reactions, including fever, rash, and increased eosinophils 1
• Fever is specifically mentioned as one of the cardinal symptoms alongside nausea, vomiting, lethargy, and right upper quadrant pain in AIH-like DILI presentations 1
• The presence of fever is considered clinically significant enough that it triggers specific management protocols in clinical trials 2

When Fever Indicates Serious DILI

The presence of fever in the context of elevated liver enzymes should prompt immediate evaluation:

Fever combined with ALT or AST ≥3× ULN should trigger consideration for drug discontinuation 2. This combination suggests:

• Potential hypersensitivity-mediated hepatotoxicity
• More severe hepatocellular injury requiring urgent intervention
• Need for immediate clinical assessment and monitoring

Distinguishing Features

Fever in DILI typically occurs as part of a hypersensitivity syndrome rather than isolated hepatocellular injury:

• Hypersensitivity-type DILI: Fever appears with rash, eosinophilia, and other systemic symptoms 1
• Pure hepatocellular DILI: Fever is less common; patients more typically present with isolated liver enzyme elevations
• Unexplained fever in the context of liver injury should always raise suspicion for DILI 3

Clinical Implications

When evaluating a patient with suspected DILI and fever:

1. Document the temporal relationship between drug exposure and symptom onset (latency typically 1-8 weeks to 3-12 months for AIH-like DILI) 1
2. Check for accompanying hypersensitivity features: rash, eosinophilia >5%, lymphadenopathy
3. Assess liver enzyme pattern: hepatocellular (ALT/AST predominant) vs. cholestatic (ALP predominant)
4. Consider immediate drug discontinuation if fever occurs with ALT/AST ≥3× ULN 2

Important Caveats

• Fever alone is not specific for DILI and requires exclusion of other causes including viral hepatitis, biliary tract disease, and systemic infections
• The absence of fever does not exclude DILI—many cases present without hypersensitivity features
• In drug-induced autoimmune-like hepatitis (DI-ALH), signs of hypersensitivity reactions such as fever are usually absent 4, making this a distinguishing feature from classic hypersensitivity DILI

The presence of fever in DILI generally indicates a hypersensitivity-mediated mechanism and warrants prompt drug discontinuation and close monitoring, as these cases may progress more rapidly and require more aggressive management.