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Yes, Lasix ( furosemide) does contain the compound sulfonamide in its molecular structure, so it has sulfa in it; however, it is usually considered to be a drug related to the sulfa drugs rather than a true sulfa drug. People who are allergic to sulfa may have a allergice reaction to Lasix but the chance is much smaller than to a true sulfa drug like an antibiotic in that family.

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16y ago

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