Tribrissen etc. (trimethoprim/sulfadiazine) is an antibiotic which consists of a mixture of two sulfa (sulfonamide) drugs, trimethoprim and sulphamethoxazole. This combination is also known as TMP-SMZ (or SMZ-TMP).
Tribrissen etc. (trimethoprim/sulfadiazine) is used to treat a variety of bacterial infections in cats, dogs, rabbits, horses and other pets.