Antimicrobial bacteriostatic agent,
sulfanilamide. The mechanism of action is due to competitive antagonism with paraaminobenzoic acid (PABA), inhibition of dihydropteroate synthetase, a violation of the synthesis of tetrahydrofolic acid necessary for the synthesis of purines and pyrimidines.
Active against gram-positive and gram-negative cocci, Escherichia coli, Shigella spp., Vibrio cholerae, Clostridium perfringens, Bacillus anthracis, Corynebacterium diphtheriae, Yersinia pestis, Chlamydia spp., Actinomyces israelii, Toxoplasma gondii.