Uses:

Co-trimoxazole is an antibiotic combination of trimethoprim and sulfamethoxazole, in the ratio of 1 to 5, used in the treatment of a variety of bacterial infections. The name co-trimoxazole is the British Approved Name, and has been marketed worldwide under many trade names including Septrin (GSK), Bactrim (Roche), and various generic preparations. According to the American Hospital Formulary Service, "co-trimoxazole usually is bactericidal." Other sources list this antibiotic as bacteriostatic.