Oxytetracycline dihydrate is widely used in veterinary medicine as an antibiotic to treat bacterial infections in livestock, poultry, and fish. It is effective against a range of pathogens, including those causing respiratory, gastrointestinal, and urinary tract infections. In aquaculture, it is administered to control diseases in fish and shellfish, ensuring healthier stocks and improved yields. Additionally, it is used in beekeeping to combat bacterial infections like American foulbrood in honeybees. In agriculture, it is sometimes applied to plants to manage bacterial diseases, though this use is less common. Its broad-spectrum activity and affordability make it a key tool in maintaining animal health and supporting food production.