It is used to treat infections, especially those attributed to Pseudomonas aeruginosa, which include infections of the biliary tract, bones and joints, cystic fibrosis (respiratory infections), endophthalmitis, infections in immunocompromised patients (neutropenic patients), meningitis, meningitis peritoneum, upper respiratory and pneumonia, urinary tract infections, septicemia, skin infection (including burns, gangrene, and skin ulcers), it is also used to prevent surgical infections. • Hospital-acquired pneumonia with gentamicin or ciprofloxacin. Meliolosis with sulfamethoxazole + trimethoprim or doxycycline.