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 used in the treatment of Bacterial infections. Find Bactrim DS Tablet uses, composition, side-effects, price, substitutes, drug interactions, precautions, warnings, and expert advice. Bactrim is available in tablets in two strengths; 400 mg sulfamethoxazole and 80 mg trimethoprim and the DS form which means double strength, 800 mg sulfamethoxazole and 160 mg trimethoprim. BACTRIM DS prescription and dosage information for physicians and health care professionals. Pharmacology, adverse reactions, warnings, and BACTRIM DSside effects. 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 contain a combination of two antibiotics, sulfamethoxazole and trimethoprim, that treat different types of infection caused by bacteria. Bactrim DS (double strength) tablets are twice as strong as Bactrim tablets. Find patient medical information for Sulfamethoxazole/Trimethoprim (Bactrim, Septra, others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user. Detailed dosage guidelines and administration information for Bactrim (sulfamethoxazole and trimethoprim). Includes dose adjustments, warnings and precautions. Bactrim DS is a popular antibiotic that treats bacterial infections like urinary tract infections (UTIs), ear infections, and certain types of pneumonia. It’s made up of two medications, sulfamethoxazole and trimethoprim, which work together to kill bacteria and resolve infections in the body. Medscape - Indication-specific dosing for Bactrim, Bactrim DS, Septra, Septra DS, Cotrim, cotrimoxazole, Sulfatrim (trimethoprim, sulfamethoxazole), frequency-based adverse effects.