What is the brand-name for sulfonamide?

The brand name for sulfonamide is often referred to as "Sulfamethoxazole," which is commonly used in combination with trimethoprim as "Bactrim" or "Septra." Sulfonamides are a class of antibiotics used to treat various bacterial infections. Different formulations and combinations may have their own brand names, but Bactrim is one of the most well-known.