- Withhold ICPI treatment until normalisation of ALT/AST to grade I
- If rising ALT/AST when re-checked wait until normalisation unless grade III or bilirubin increases: start methylprednisolone 1mg/kg (https://www.ncbi.nlm.nih.gov/pubmed/29427729)

- Re-check LFTs/INR/albumin every 3 days
- Review medications, e.g. statins, antibiotics and alcohol history
- Perform liver screen: – Hepatitis A/B/C serology – Hepatitis E PCR – Anti-ANA/SMA/LKM/SLA/LP/LCI – Iron studie
- Consider imaging for metastases/portal trombosis

Steroid wean:
- G2: once G1, wean over 2 weeks; re-escalate if worsening; treatment may be resumed once prednisolone < 10 mg
- G3/4: once improved to G2, can change to oral prednisolone and wean over 4 weeks; for G3, rechallenge only at consultant discretion

Worsening despite steroids:
- If on oral change to i.v. (methyl)prednisolone
- If on i.v. add MMF 500-1000 mg b.d.
- If worse on MMF, consider addition of tacrolimus
- A case report has described the use of anti-thymocyte globulin in steroid + MMF-refractory fulminant hepatitis