First exposure to a monoclonal antibody (rituximab, obinutuzumab, brentuximab vedotin, mo...
Deterministic view of the source YAML entity. Clinical authority remains with the cited source IDs and reviewer sign-off state.
| ID | RF-UNIVERSAL-INFUSION-REACTION-FIRST-CYCLE |
|---|---|
| Type | Red flag |
| Status | reviewed 2026-04-25 | pending_clinical_signoff |
| Diseases | None declared |
| Sources | SRC-ESMO-MZL-2024 SRC-NCCN-BCELL-2025 |
Red Flag Origin
| Definition | First exposure to a monoclonal antibody (rituximab, obinutuzumab, brentuximab vedotin, mogamulizumab, alemtuzumab, daratumumab) — high baseline rate of infusion reactions at cycle 1, declining sharply by cycle 3. Surveillance and slow-rate first infusion required. |
|---|---|
| Clinical direction | investigate |
| Category | other |
Trigger Logic
{
"all_of": [
{
"comparator": "==",
"finding": "cycle_number",
"threshold": 1
},
{
"any_of": [
{
"finding": "regimen_contains_rituximab",
"value": true
},
{
"finding": "regimen_contains_obinutuzumab",
"value": true
},
{
"finding": "regimen_contains_brentuximab",
"value": true
},
{
"finding": "regimen_contains_mogamulizumab",
"value": true
},
{
"finding": "regimen_contains_alemtuzumab",
"value": true
},
{
"finding": "regimen_contains_daratumumab",
"value": true
}
]
}
],
"type": "composite_score"
}
Notes
Anti-CD20 cycle-1 infusion-reaction rate: 30-77% any-grade for rituximab (Lim et al. 2012); 65% for obinutuzumab cycle-1 vs <10% by cycle-3. Premedication: paracetamol 1g + diphenhydramine 25-50 mg PO 30-60 min pre-infusion; methylprednisolone 80-100 mg IV when CD20 burden is high. Initial infusion rate 50 mg/h, escalate by 50 mg/h every 30 min if no reaction, max 400 mg/h (rituximab). Mogamulizumab and brentuximab have their own premedication regimens — engine should select per drug.
Used By
No reverse references found in the YAML corpus.