IT IS A SHORT ACTING SULPHONAMIDE. THE USE OF SULPHADIAZINE HAS BEEN LIMITED BY THE INCREASING INCIDENCE OF RESISTANT ORGANISMS. IT IS USED IN THE TREATMENT OF ACUTE, UNCOMPLICATEDD U.T.I. , PARTICULARLY THOSE CAUSED BY ESCHERICHIA COLI. IT HAS ALSO BEEN USED IN NOCARDIOSIS, AND IN SOME OTHER BACTERIAL INFECTIONS. IT HAS BEEN GIVEN FOR THE PROPHYLAXIS OF RHEUMATIC FEVER IN PENICILLIN-ALLERGIC PATIENTS.