Sulfamerazine is primarily used as an antibacterial agent in veterinary medicine to treat infections in livestock and poultry. It is effective against a range of bacterial diseases, including respiratory and gastrointestinal infections. The compound is often administered through feed or water to ensure proper dosage and ease of application. In aquaculture, it is utilized to control bacterial infections in fish, promoting healthier stocks. Additionally, it has been explored in research settings for its potential antimicrobial properties in human medicine, though its use in humans is limited due to the development of more advanced antibiotics. Proper handling and adherence to recommended dosages are crucial to avoid resistance and ensure efficacy.