Flumequine is primarily used as an antibacterial agent in veterinary medicine, particularly for the treatment of bacterial infections in livestock, poultry, and fish. It is effective against a range of Gram-negative bacteria, making it suitable for managing conditions such as gastrointestinal and respiratory infections in animals. In aquaculture, flumequine is applied to control bacterial diseases in fish, helping to maintain healthy stocks and prevent economic losses. Its use is carefully regulated to minimize the risk of developing antibiotic resistance and to ensure food safety for consumers.