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. 2022 Mar 30;9(4):26. doi: 10.3390/medicines9040026

Table 2.

Grading system for allergic reaction and anaphylaxis with Common Terminology Criteria for Adverse Events version 5.0.

Allergic Reaction Anaphylaxis
Grade Clinical symptoms
0 No reaction No reaction
1 Systemic intervention not indicated -
2 Oral intervention indicated -
3 Bronchospasm: hospitalisation indicated for clinical sequelae; intravenous intervention indicated Symptomatic bronchospasm, with or without urticaria, parenteral intervention indicated: allergy-related oedema/angioedema, hypotension
4 Life-threatening consequences: urgent intervention indicated Life-threatening consequences: urgent intervention indicated
5 Death Death