What is Bactrim? Generic Bactrim is an antibiotic which treats bacterial infections. The main ingredients of Generic Bactrim are trimethoprim and sulfamethoxazole. Bactrim Online contains a combination of sulfamethoxazole and trimethoprim. Sulfamethoxazole and trimethoprim Dosage are are both antibiotics that treat different types of infection caused by bacteria. Bactrim is used to treat ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia. Bactrim may also be used for purposes not listed in this medication guide. Important information You should not use Bactrim if you have severe liver or kidney disease, anemia caused by folic acid deficiency, or a history of low blood platelets caused by taking trimethoprim or any sulfa drug. Before taking this medicin ... Read more »