Drugs are both used to treat urticaria and may be a cause of urticaria. Good information on incidence of drug-induced urticaria is hard to find. Urticaria is listed as a possible side effect of many drugs on the market. The best known are antibiotics and non-steroidal anti-inflammatories (NSAIDs) but even H1 antihistamines have been implicated as an occasional cause. Many drug reactions presenting with acute urticaria are due to type I hypersensitivity, involving the interaction of... Click here to read the whole Expert Opinion!
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