Title: Definition of Sulfa drug
Headings: Medical Definition of Sulfa drug
Medical Definition of Sulfa drug
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Content: Definition of Sulfa drug
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Medical Definition of Sulfa drug
Medical Editor: Charles Patrick Davis, MD, PhD
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©1996-2021 MedicineNet, Inc. All rights reserved. Terms of Use. MedicineNet does not provide medical advice, diagnosis or treatment. See additional information. Sulfa drug: One of the sulfonamides, the sulfa-related antibiotics which are used to treat bacterial and some fungal infections. The first sulfa drug was prontosil. It was discovered by the German physician and chemist Gerhard Domagk in 1935. Sulfa drugs kill bacteria and fungi by interfering with their metabolism.