Author： Mathelier-Fusade Pascale
Publisher： Humana Press, Inc
ISSN： 1080-0549
Source： Clinical Reviews in Allergy and Immunology, Vol.30, Iss.1, 2006-02, pp. : 19-23
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Abstract
Drugs may cause urticaria by different mechanisms. The most well-known mechanism is the allergic reaction mediated by immunoglobulin (Ig)E antibodies, which induce acute generalized urticaria. Allergic reactions to β-lactams are the most common cause of adverse drug reaction mediated by IgE antibodies. However, IgE antibodies are not always necessary to activate the release of mediators from mast cells and induce acute urticarias. Some drugs, such as opiates or codeine, act directly on mast cells, and others, such as aspirin and nonsteroidal anti-inflammatories, induce an exacerbation of chronic urticaria by a pharmacological mechanism involving the arachidonic acid metabolism. Additionally, angioedema is a well-known complication of angiotensin-converting enzyme inhibitors by its action on bradykinin, which is a potent vasodilatator agent. Topical drugs, such as antibiotics, disinfectants, or anesthetics, may cause urticaria, which sometimes progresses to generalized urticaria and, more rarely, to anaphylactoid reactions.
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