Drug-Induced Cholestasis: Causative Medications
A wide range of medications can cause drug-induced cholestasis, with the most frequently implicated classes being antibiotics (particularly amoxicillin-clavulanate, erythromycin, oxypenicillins, fluoroquinolones), psychotropic agents (chlorpromazine, antidepressants), hormonal steroids (estrogens, anabolic steroids, tamoxifen), cardiovascular drugs (statins, antiarrhythmics, irbesartan), and NSAIDs (ibuprofen, diclofenac, nimesulide). 1, 2
Major Drug Categories and Specific Agents
Antibiotics and Antimicrobials
- Amoxicillin-clavulanate: One of the most common causes of cholestatic DILI, can lead to vanishing bile duct syndrome 2
- Macrolides: Erythromycin (classic agent), newer macrolides also implicated 2
- Oxypenicillins: Flucloxacillin notably associated with prolonged cholestasis and vanishing bile duct syndrome 3
- Fluoroquinolones: Contemporary agents linked to cholestatic injury 2
- Tuberculostatics: Well-documented cholestatic potential 4
- Terbinafine: Antifungal with cholestatic risk 2
Psychotropic Medications
- Phenothiazines: Chlorpromazine is the prototypical agent, can cause progressive bile duct loss 5
- Antidepressants: Multiple agents across different classes 4, 5
- Anticonvulsants: Various agents implicated 4
Hormonal Agents
- Estrogens and anabolic steroids: Classic causes of "bland" reversible cholestasis 2
- Tamoxifen: Structurally similar to estrogens, shares cholestatic potential 2
Cardiovascular Drugs
- Statins (HMG-CoA reductase inhibitors): Important consideration with newer drugs for hypercholesterolemia 2, 4
- Antiarrhythmics: Broad category with cholestatic risk 4
- Irbesartan: ARB linked to cholestatic injury 2
Anti-inflammatory and Analgesic Agents
Other Notable Agents
- Ticlopidine: Antiplatelet agent 2
- Terfenadine: Antihistamine (now withdrawn) 2
- Immunosuppressives: Various agents 4
- Narcotics and tranquilizers: Multiple agents 4
Emerging and Contemporary Concerns
Checkpoint Inhibitors
Recent evidence identifies checkpoint inhibitors as capable of causing secondary sclerosing cholangitis, representing a newer clinical phenotype of drug-induced cholestasis 1
Herbal and Dietary Supplements
- Greater celandine
- Glycyrrhizin
- Chaparral
- Chinese herbal medicines: Documented hepatotoxic potential 3, 2
Chemotherapeutic Agents
Floxuridine (intra-arterial infusion): Causes sclerosing cholangitis in patients treated for hepatic metastases, with poor prognosis and potential for death 5
Clinical Phenotypes and Severity Spectrum
The cholestatic injury pattern ranges from:
- Bland reversible cholestasis: Typically resolves within 6 months 2, 5
- Cholestatic hepatitis: Mixed pattern with hepatocellular injury 1
- Vanishing bile duct syndrome: Progressive bile duct loss, can lead to biliary cirrhosis 1, 2
- Secondary sclerosing cholangitis: Newly recognized phenotype 1
Genetic Susceptibility
Specific HLA profiles have been identified for certain drugs (tiopronin, amoxicillin-clavulanate), and mutations in hepatobiliary transporters (ATP8B1, ABCB11, ABCB4) predispose to drug-induced cholestasis 2, 6. Drugs can have transcriptional or functional inhibitory effects on transporters like BSEP and MDR3, facilitating cholestatic injury 6.
Critical Clinical Pitfalls
- Nearly any drug can cause cholestasis, particularly newly introduced medications—maintain high index of suspicion 4
- Temporal relationship is key: Diagnosis is circumstantial; positive rechallenge is the only unequivocal proof 3
- Prolonged cholestasis risk: Some patients develop chronic cholestasis mimicking primary biliary cirrhosis despite drug withdrawal, though prognosis is generally better than PBC 5
- Competing diagnoses must be excluded: Hepatobiliary malignancy, choledocholithiasis, viral hepatitis, sepsis-related cholestasis, primary/secondary cholangitis, right-sided heart failure 1