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Anafilaxia

La anafilaxia es un tipo sistémico (en todo el organismo) de reacción alérgica que se presenta cuando la persona se sensibiliza a ciertas sustancias o alergenos y se expone de nuevo al alérgeno. Algunos medicamentos como aquellos que se usan para aliviar el dolor o para radiografías pueden causar una reacción anafiláctica en la primera exposición. Las histaminas y otras sustancias que se liberan dentro del torrente sanguíneo causan dilatación de los vasos e inflamación de los tejidos. La anafilaxia puede amenazar la vida si se presenta una obstrucción de las vías respiratorias, si declina la presión sanguínea o si se presenta una arritmia cardíaca.
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