TRIMOSUL 400 Oral Suspension combines trimethoprim (80 mg/mL) and sulfadiazine (400 mg/mL), a synergistic potentiated sulfonamide combination that blocks two successive steps of bacterial folic acid synthesis. It is effective against a wide range of Gram-positive and Gram-negative bacteria and is indicated for the treatment of respiratory, gastrointestinal and urinary tract infections in poultry caused by susceptible organisms.