<unk> functional group Hydrochlorothiazide is a<unk> and a thiazide. Furosemide is a<unk>  but not a thiazide. Sulfamethoxazole is an antibacterial<unk><unk>  is a functional group (a part of a molecule) that is the basis of several groups of drugs, which are called sulphonamides, sulfa drugs or sulpha drugs. The original antibacterial<unk>  are synthetic (nonantibiotic) antimicrobial agents that contain the<unk> group. Some<unk>  are also devoid of antibacterial activity, e.g., the anticonvulsant sultiame. The sulfonylureas and thiazide diuretics are newer drug groups based upon the antibacterial<unk> . Allergies to<unk>  are common. The overall incidence of adverse drug reactions to sulfa antibiotics is approximately 3%, close to penicillin; hence medications containing<unk>  are prescribed carefully.<unk> drugs were the first broadly effective antibacterials to be used systemically, and paved the way for the antibiotic revolution in medicine.
Sulfonamide 
Quinolone antibiotic
Anthopleurin
Cephalosporin
Lipase inhibitors
Polypeptide antibiotic
Steroid ester
Cephalotribe