Table 4. Clinical criteria for diagnosing anaphylaxis (1).

1	Acute onset of an illness (minutes to hours) that involves the skin, mucosal tissue, or both, along with either:	Sudden respiratory signs and symptoms Sudden reduced blood pressure and /or end organ dysfunction
2	Two or more of the following that occur promptly after exposure to a potential allergen for the patient, including:	Involvement of skin mucosal tissue Respiratory involvement Reduced blood pressure or associated symptoms Gastrointestinal symptoms
3	Reduced blood pressure (BP) as a result of exposure to a known allergen trigger.	Reduced BP in Adults	<90 mmHg systolic 30% decrease from baseline
		Reduced BP in children	Low systolic (age specific) 30% decrease from baseline