Pirlimycin Hydrochloride is primarily used in veterinary medicine as an antibiotic to treat mastitis in dairy cows. It is effective against a variety of gram-positive bacteria, including Staphylococcus aureus and Streptococcus species, which are common causes of udder infections. The compound is administered via intramammary infusion, directly targeting the infected mammary glands. Its use helps reduce bacterial load, alleviates symptoms, and improves milk quality. Additionally, it minimizes the risk of antibiotic residues in milk, ensuring compliance with food safety regulations. Proper administration and adherence to withdrawal periods are crucial to maintain animal health and public safety.