Aztreonam is a monobactam antibiotic that is used to treat serious infections caused by susceptible bacteria. It works by inhibiting the synthesis of bacterial cell walls, leading to the disruption of the bacterial growth and ultimately killing the bacteria. Aztreonam is commonly prescribed for conditions such as urinary tract infections, lower respiratory tract infections, skin and soft tissue infections, and intra-abdominal infections. It is available in various forms including injection and inhalation, making it suitable for different patient needs.