Valnemulin hydrochloride is primarily used in veterinary medicine as an antibiotic to treat and prevent respiratory and intestinal infections in swine. It is effective against Mycoplasma hyopneumoniae, which causes enzootic pneumonia in pigs, and Lawsonia intracellularis, the causative agent of porcine proliferative enteropathy. The compound works by inhibiting bacterial protein synthesis, making it a valuable tool in managing bacterial diseases in livestock. Its application helps improve animal health, reduce mortality rates, and enhance overall productivity in pig farming. Additionally, it is often administered through feed or water, ensuring ease of use in large-scale farming operations.