Aztreonam is a type of antibiotic that belongs to the class of drugs known as monobactams. It is primarily used to treat infections caused by certain types of bacteria, particularly Gram-negative bacteria. Aztreonam works by inhibiting bacterial cell wall synthesis, which ultimately leads to the death of the bacteria. This medication is often prescribed for patients who are allergic to penicillin or when other antibiotics are not effective. Aztreonam can be administered through injection or intravenously, making it suitable for treating serious infections in hospitals. It is important to use this antibiotic only under the guidance of a healthcare professional.