Azlocillin sodium salt is primarily used as an antibiotic in the medical field, particularly for treating infections caused by susceptible strains of bacteria. It is effective against a range of Gram-negative and some Gram-positive bacteria, making it useful in combating conditions like urinary tract infections, respiratory tract infections, and septicemia. Its broad-spectrum activity is especially valuable in hospital settings for managing severe infections, including those caused by Pseudomonas aeruginosa. Additionally, it is often employed in cases where patients have compromised immune systems or are undergoing treatments that increase their risk of bacterial infections. Due to its formulation as a sodium salt, it is typically administered via injection, ensuring rapid and effective delivery into the bloodstream.