Amides [Chemical/Ingredient] Sulfonamides [Chemical/Ingredient] 10215 C0038760 Sulfonamides C26460 Sulfonamides M0020790 A group of compounds that contain the structure SO2NH2. Members of this group, also known as sulfa drugs, are derivatives of sulfanilamide, which competitively inhibit folic acid synthesis in microorganisms, and are bacteriostatic. They have been largely supplanted by more effective and less toxic antibiotics. (From Dorland, 28th ed) N0000008048 D013449 Sulfones [Chemical/Ingredient]