Ceftazidime/avibactam, brand names include Avycaz among others, is a combination drug composed of ceftazidime, a cephalosporin antibiotic, and avibactam, a β-lactamase inhibitor. It is used for the treatment of serious bacterial infections. Ceftazidime/avibactam, brand names include Avycaz among others, is a combination drug composed of ceftazidime, a cephalosporin antibiotic, and avibactam, a β-lactamase inhibitor. It is used for the treatment of serious bacterial infections. Ceftazidime/avibactam was developed for the treatment of certain multidrug-resistant gram-negative infections.