a sulfa drug used in treating meningitis and pneumonia and other infections

An inhibitor of bacterial folic acid synthesis, which has been highly effective against pneumococcal, staphylococcal, streptococcal, E. coli, and Klebsiella pneumoniae infections, and also useful in acute gonococcal arthritis.

Sulfadiazine is a sulfonamide antibiotic. It eliminates bacteria that cause infections by stopping the production of folic acid inside the bacterial cell, and is commonly used to treat urinary tract infections (UTIs).