Polymyxin B is an injectable preparation, the full name of which is Polymyxin B Sulfate for Injection, an antibiotic used against infections caused by gram-negative bacilli. Polymyxin B Sulfate for Injection is commonly used clinically against infections caused by gram-negative bacilli such as Pseudomonas aeruginosa, Pseudomonas aeruginosa, Escherichia coli, Pneumococcus pneumoniae, and Influenza bacilli, mainly Pseudomonas aeruginosa. Polymyxin B Sulfate for Injection can be used for the treatment of lung infections, urinary tract infections, meningitis, sepsis, and skin, soft tissue, and joint infections caused by the above pathogens. Polymyxin B Sulfate for Injection can be used intramuscularly or intravenously. Possible adverse reactions include nephrotoxicity, such as can lead to proteinuria; neurotoxicity, which can be manifested as facial flushing, dizziness, somnolence, etc.; others may also be drug fever, urticaria, phlebitis, pain at the injection site, and so on. Allergic to this drug is prohibited. Polymyxin B Sulfate for Injection must be used for patient treatment in a medical institution, in accordance with medical advice and operated by professional personnel, and should actively cooperate with health care personnel. Discomfort after the use of the drug timely communication with health care.