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Table 2 Grading of anaphylaxis according to severity of clinical symptoms. Mueller 1966

From: Pre-hospital treatment of bee and wasp induced anaphylactic reactions: a retrospective study

Grade Signs and Symptoms
1 Slight general reaction Generalized urticaria, itching, malaise and anxiety
2 General reaction Any of the above plus two or more of following: generalized edema; constriction in chest; wheezing; abdominal pain; nausea and vomiting; and dizziness
3 Severe general reaction Any of the above plus two or more of following: dyspnea; dysphagia; hoarseness or thickened speech; confusion; and feeling of impending disaster
4 Shock reaction Any of the above plus two or more of following: cyanosis; fall in blood pressure; collapse incontinence; and unconsciousness