what is bactrim septra ds used for
Sulfamethoxazole and trimethoprim are both antibiotics that treat different types of infection caused by bacteria. The combination of sulfamethoxazole and trimethoprim is used to treat ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia.Sulfamethoxazole and trimethoprim may also be used for purposes not listed in this medication guide.he combination of sulfamethoxazole and trimethoprim is used to treat ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia.