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- W177527576 abstract "Anaphylaxis and anaphylactoid reactions are potentially fatal. These disorders are sometimes iatrogenic, and increase with increased exposure to drugs, synthetic substances, and medical procedures. Non-IgE-mediated anaphylactoid reactions are common in medical settings and are clinically indistinguishable from anaphylaxis. These reactions may be unrecognized if a rigid classic definition of anaphylaxis is used. Histamine is a primary mediator of anaphylaxis and signs and symptoms of anaphylaxis can be reproduced by histamine infusion. Histamine triggers a cascade of inflammatory mediators and modulates its own release. H1-antihistamines are adjunctive treatment therapy for acute anaphylaxis and anaphylactoid reactions, in which many mediators of inflammation are involved. Compared with epinephrine, the first-response medication of choice, antihistamines have a slow onset of action, and they cannot block events that occur subsequent to histamine binding to its receptors. Antihistamines are an important component of regimens for the prevention of anaphylaxis and anaphylactoid reactions in patients at risk, and may eventually have more widespread application in the perioperative setting. In some instances, such as with exercise-induced anaphylaxis and reactions to latex in sensitized individuals, prophylaxis regimens are not always effective. H2-antagonists are not detrimental in the therapy of anaphylaxis and many studies show a favorable outcome when combining H1- and H2-antagonist therapy for prophylaxis. They should be added to therapy at the discretion of the treating physician. Because of decreased antimuscarinic and central nervous system side effects, the newer antihistamines can be given in high doses, allowing more complete blockade of histamine receptors. These agents should lead to a reevaluation of the usefulness of antihistamines in both the treatment of acute anaphylaxis and in prophylactic regimens. The unavailability of parenterally administered second-generation H1-antagonists limits their usefulness in acute anaphylaxis and perioperative prophylaxis." @default.
- W177527576 created "2016-06-24" @default.
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- W177527576 date "2002-06-26" @default.
- W177527576 modified "2023-09-27" @default.
- W177527576 title "Histamine and Antihistamines in Anaphylaxis" @default.
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- W177527576 doi "https://doi.org/10.3109/9780203910375-14" @default.
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