Fosfomycin phenylethylamine is primarily used as an antibacterial agent, particularly effective against a wide range of Gram-positive and Gram-negative bacteria. It is commonly applied in the treatment of urinary tract infections (UTIs), including acute uncomplicated cystitis in women. The compound works by inhibiting the early stages of bacterial cell wall synthesis, making it a valuable option for infections caused by multidrug-resistant pathogens. Additionally, it is often utilized in veterinary medicine to treat bacterial infections in animals. Its broad-spectrum activity and low resistance development make it a reliable choice in both human and animal healthcare.