<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>
what are the symptoms of a systemic anaphylactic reaction
an itchy rash throat or tongue swelling shortness of breath vomiting lightheadedness low blood pressure