BACTRIM (sulfamethoxazole and trimethoprim) is a synthetic antibacterial combination product available in DS (double strength) tablets, each containing 800 mg sulfamethoxazole and 160 mg trimethoprim; in tablets, each containing 400 mg sulfamethoxazole and 80 mg trimethoprim for oral administration. Bactrim and Bactrim DS are antibiotics used to treat ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia. BACTRIM (sulfamethoxazole and trimethoprim) is a synthetic antibacterial combination product available in DS (double strength) tablets, each containing 800 mg sulfamethoxazole and 160 mg trimethoprim; in tablets, each containing 400 mg sulfamethoxazole and 80 mg trimethoprim for oral administration. Sulfamethoxazole and trimethoprim is a combination antibiotic used to treat ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia. Find patient medical information for Sulfamethoxazole/Trimethoprim (Bactrim, Septra, and oothers) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user. Medscape - Indication-specific dosing for Bactrim, Bactrim DS, Septra, Septra DS, Cotrim, cotrimoxazole, Sulfatrim (trimethoprim, sulfamethoxazole), frequency-based adverse effects. Sulfamethoxazole and trimethoprim combination is an antibiotic. It works by eliminating the bacteria that cause many kinds of infections. This medicine will not work for colds, flu, or other virus infections. This medicine is available only with your doctor's prescription. Bactrim DS Tablet is a combination of two medicines: Sulfamethoxazole+Trimethoprim. It is an antibiotic used to treat certain bacterial infections and works by stopping the growth of the bacteria causing the infection. BACTRIM DS prescription and dosage information for physicians and health care professionals. Pharmacology, adverse reactions, warnings, and BACTRIM DSside effects. Bactrim DS is a combination antibiotic used to treat bacterial infections such as urinary tract infections (UTIs), ear infections, and certain types of pneumonia. It contains two medications, sulfamethoxazole and trimethoprim, which work together to kill bacteria. Bactrim comes in different forms.