Learn about uses, side effects, dosage, and more for Bactrim. It's a prescription oral tablet used to treat certain types of infection in adults and some children. This medication is a combination of two antibiotics: sulfamethoxazole and trimethoprim. It is used to treat a wide variety of bacterial infections. It is also used to prevent and treat a certain type of pneumonia (pneumocystis-type). This medication treats only certain types of infections. Bactrim (Trimethoprim and Sulfamethoxazole) may treat UTI, side effects, dosage, drug interactions, warnings, patient labeling, and more Sulfamethoxazole and trimethoprim combination is used to treat infections including urinary tract infections, middle ear infections (otitis media), bronchitis, traveler's diarrhea, and shigellosis (bacillary dysentery). Bactrim is a prescription drug used for certain types of bacterial infections. Learn about its dosage, including its form, strengths, how it's taken, and more. Sulfamethoxazole and trimethoprim is a combination antibiotic used to treat ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia. Bactrim is used to treat certain types of infections. Find out what the recommended dosages are, how to take the drug, and more. Bactrim (sulfamethoxazole and trimethoprim) is an antibiotic used to treat ear infections, urinary tract and other infections. Includes Bactrim side effects, interactions and indications. Find drug information for Sulfamethoxazole/trimethoprim on CVS.com, including related drug classes, side effects, dosage, and answers to frequently asked questions. This medication is a combination of two antibiotics: sulfamethoxazole and trimethoprim. It is used to treat a wide variety of bacterial infections. It is also used to prevent and treat a certain type of pneumonia (pneumocystis-type). This medication treats only certain types of infections.