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Diagnosis and Management of Idiosyncratic Drug-induced Liver Injury (DILI)

DILI Types:
 • Intrinsic - predictable, dose dependent
Injury (DILI) ... dose dependent injury ... Chronic - ongoing ↑ LFTs ... or symptoms of liver ... Drug #induced #Liver
Elevated Liver Function Tests (LFTs) - Differential Diagnosis Framework
Mild (<100-500): 
 • NAFLD
 • Cirrhosis
 •
Tests (LFTs) - ... Hepatopathy • Acute ... (>1000): • DILI ... injury) • Ischemic ... Function #Tests #LFTs
Liver Function Test (LFTs) Elevation
AST - Cardiac and skeletal muscle, kidney, brain
ALT - More specific for
(LFTs) Elevation ... abnormality vs bone Bili ... Hepatocellular injury ... 2: Cholestatic injury ... #FunctionTest #LFTs
Drug Induced Liver Injury (DILI) - Stepwise Diagnosis Algorithm
DILI suspicion
Features toxic aetiology: Skin involvement, Kidney injury,
Injury (DILI) - ... involvement, Kidney injury ... , Previous DILI ... dechallenge • Acute ... #Injury #Diagnosis
Acute Liver Injury - Differential Diagnosis Algorithm

Vascular Causes of Acute Liver Injury: 
 • Hepatic vein:
Acute Liver Injury ... Liver Injury: ... Liver Injury: ... • Iatrogenic: DILI ... Liver Injury:
Liver Chemistries - Interpretation of LFTs

R-value: Serum (ALT/ULN ALT) / (Alk phos/ULN ALP)
 • R >
Interpretation of LFTs ... injury < 26 weeks ... Unconjugated Bili ... > 90% of Total Bili ... transaminitis #LFTs
Acute-on-Chronic Liver Failure (ACLF) Clinical Guidelines

ACLF = possibly reversible condition in those with CLD (± cirrhosis)
Acute-on-Chronic ... Liver Failure ( ... disease, liver ... Injury (DILI) ... EmoryGastroHep #ACLF #Acute
Liver Function Tests (LFTs) - Normal Values and Interpretation

Alanine aminotransferase (ALT/SGPT) - Liver, cardiac & skeletal
Liver Function Tests ... (LFTs) - Normal ... bilirubin (Conjugated/DBili ... hepatocellular injury ... Function #Tests #LFTs
Patterns of Liver Injury
Transaminase Levels:
  > 50x normal - Ischemic Hepatitis
  > 20x normal
Patterns of Liver ... Injury Transaminase ... > 20x normal - Acute ... #Patterns #Liver ... #LFTs #transaminitis