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ID Board Review/Antimicrobial Therapy/Antibacterials/β-Lactams/Monobactams/Aztreonam
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Aztreonam has good gram-negative coverage
It's often used for patients with beta-lactam allergies 10.1016/s0025-7125(16)30036-0
The one exception is ceftazidime, which has the same side chain, and can cause cross-reactivity
It can also be used as an alternative to aminoglycosides, since aztreonam isn't ototoxic or nephrotoxic10.1016/s0025-7125(16)30036-0