− | Sulphonamides are derivatives of sulphanilamide, an active metabolite of the pro-drug and dye prontosil. Commonly used ones are; '''sulphadiazine, sulphaquinoxaline, sulphadimethoxine, sulphadoxine''' and '''sulphanilamide'''. | + | Sulphonamides are derivatives of sulphanilamide, an active metabolite of the pro-drug and dye prontosil. Commonly used ones are: '''sulphadiazine, sulphaquinoxaline, sulphadimethoxine, sulphadoxine''' and '''sulphanilamide'''. |