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Table 3 Summary of the physicians’ guidelines for IMP’s temporary interruption and permanent discontinuation in case of immune-related adverse events. PI: principal Investigator

From: PRIME-HCC: phase Ib study of neoadjuvant ipilimumab and nivolumab prior to liver resection for hepatocellular carcinoma

Toxicity

Hold treatment for grade

Timing for restarting treatment

Diarrhoea/

Colitis

2–3

Toxicity resolves to Grade 0–1

4

Permanently discontinue

AST, ALT, or Increased Bilirubin

2

Toxicity resolves to Grade 0–1

3–4

Permanently discontinue (see exception below)a

Type 1 diabetes mellitus (if new onset) or Hyperglycaemia

T1DM or

3–4

Hold the IMP for new onset Type 1 diabetes mellitus or Grade 3–4 hyperglycemia associated with evidence of beta cell failure

Hypophysitis

2–4

Toxicity resolves to Grade 0–1. Therapy with IMP can be continued while endocrine replacement therapy is instituted

Hyperthyroidism

3

Toxicity resolves to Grade 0–1

4

Permanently discontinue

Hypothyroidism

N/A

Therapy with IMP can be continued while thyroid replacement therapy is instituted

Infusion Reaction

2b

Toxicity resolves to Grade 0–1

3–4

Permanently discontinue

Pneumonitis

2

Toxicity resolves to Grade 0–1

3–4

Permanently discontinue

Renal Failure or Nephritis

2

Toxicity resolves to Grade 0–1

3–4

Permanently discontinue

All Other Drug-Related Toxicityc

3 or Severe

Toxicity resolves to Grade 0–1

4

Permanently discontinue

  1. Note: Permanently discontinue for any severe or Grade 3 drug-related AE that recurs or any life-threatening event
  2. a For participants who begin treatment with Grade 2 AST or ALT at Cycle 1 Day 1 of treatment, if AST or ALT increases by greater than or equal to 50% relative to baseline and lasts for at least 1 week then participants should be discontinued
  3. b If symptoms resolve within one hour of stopping IMP infusion, the infusion may be restarted at 50% of the original infusion rate (e.g., from 100 mL/hr. to 50 mL/hr). Otherwise dosing will be held until symptoms resolve and the participant should be pre-medicated for the next scheduled dose
  4. c Participants with intolerable or persistent Grade 2 drug-related AE may hold study medication at PI/delegate discretion