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The Confusion With Sulfa, Sulfite, Sulfate and Sulfur Allergy

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Updated June 04, 2014

There is much confusion regarding allergy to sulfa-containing drugs, sulfite as a preservative agent in foods and medications, sulfate salts of medications and the chemical element sulfur. Many of my patients assume that if they are allergic to one of these agents, then they are allergic to all of them. This is not necessarily true!

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