First drugs which were largely used for chemotherapeutically and preventive use were the sulfonamides. Sulfonamides have a wide range of pharmacological activities such as against rheumatoid arthritis, anti-hypertensive, anti-epileptic, anti-bacterial, anti-protozoal, anti-fungal, non-peptidic vasopressin receptor antagonists, antiinflammatory, and translation initiation inhibitors. These sulfo...