Metronidazole Sodium Chloride Injection is used for the treatment of infectious diseases caused by anaerobic bacteria, usually respiratory system infections, central nervous system infections as well as bone and joint infections. 1、Respiratory system infections: commonly found in chronic sinusitis, peritonsillar abscesses and lung infections. 2, central nervous system infections: such as brain abscess or meningitis. Brain abscess can be manifested as headache, slow reaction, aphasia and so on; meningitis can be manifested as fever, headache and neck straightness and so on. 3、Bone and joint infections: mainly manifested as localized swelling, limitation of limb movement, pain and so on. Metronidazole Sodium Chloride Injection may cause adverse symptoms in the digestive tract during use, including nausea, loss of appetite, vomiting, diarrhea, abdominal pain and other symptoms. Metronidazole Sodium Chloride Injection is contraindicated in those who are allergic to it, and is contraindicated in pregnant and lactating women. For patients with liver disease need to be used with caution or reduce the dose of use, because this product can inhibit the metabolism of alcohol, so abstain from alcohol during the use of the drug. This product should be used under the guidance of a physician.