<Tr> <Th> Treatment </Th> <Td> Epinephrine, intravenous fluids </Td> </Tr> <Tr> <Th> Frequency </Th> <Td> 0.05--2% </Td> </Tr> <P> Anaphylaxis is a serious allergic reaction that is rapid in onset and may cause death . It typically causes more than one of the following: an itchy rash, throat or tongue swelling, shortness of breath, vomiting, lightheadedness, and low blood pressure . These symptoms typically come on over minutes to hours . </P> <P> Common causes include insect bites and stings, foods, and medications . Other causes include latex exposure and exercise . Additionally cases may occur without an obvious reason . The mechanism involves the release of mediators from certain types of white blood cells triggered by either immunologic or non-immunologic mechanisms . Diagnosis is based on the presenting symptoms and signs after exposure to a potential allergen . </P>

What are the symptoms of a systemic anaphylactic reaction