Bactrim - a combined drug, containing two active ingredients: sulfanamide drug sulfamethoxazole and derivative of diaminopyrimidine - trimethoprimum. Colibacillus life activity oppresses that leads to reduction of synthesis of thymine, riboflavinum, niacin, etc. group B vitamins in intestines. Duration of therapeutic effect makes 7 years.

Septra - Sulfamethoxazole is an antibiotic that treats various types of infections caused by bacteria. The combination of sulfamethoxazole and trimethoprim is used to treat ear infection, urinary tract infection, prostate infection, bronchitis, travelers' diarrhea and pneumocystis pneumonia. The drug is available in the form of tablets, as well as in liquid form.