Diaveridine is primarily used as a veterinary antibacterial agent, often in combination with sulfonamides to enhance their efficacy. It works by inhibiting dihydrofolate reductase, an enzyme crucial for bacterial DNA synthesis, thereby preventing the growth and reproduction of bacteria. This combination is particularly effective in treating gastrointestinal and respiratory infections in livestock, such as poultry, pigs, and cattle. Additionally, it is employed to combat coccidiosis, a parasitic disease affecting the intestinal tracts of animals. Its use helps improve animal health, productivity, and overall farm efficiency.