Sulfadiazine tablet 500 mg is an antibiotic drug that fights bacteria. It is used to treat a wide range of infections, such as urinary tract infections, meningitis, malaria, toxoplasmosis, ear infections, and others. As an antibiotic, sulfadiazine 500 mg tablets hold up the bacteria from forming folic acid, a nutrient needed for bacterial multiplication. This medicine is taken in the dosage and duration as advised by your health specialist. Swallow the pills completely (whole), even without chewing, crushing, or breaking. Tablets of sulfadiazine 500 mg may be taken with or without meals, but it is best to take it persistently every time. This medicinal product may be unsafe to use during pregnancy. Animal findings have shown adverse effects on the fetus, although there are limited human studies. The benefits from use during pregnancy may be acceptable despite the risk. Please consult your health specialist.