Sulfonamide : Sulfonamide (sometimes called sulfa drugs) is in lasix (furosemide). Sulfonamides are a basis for many drugs (where sulfur is used in the production).
Answered 10/3/2016
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Pharmacy: Ask your pharmacist about your concern to be completely sure since Lasix (furosemide) does have sulfur in its formulation.
Answered 6/26/2014
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