Metronidazole injection is effective in the treatment of anaerobic infections, the specific use of drugs need to be under the guidance of a doctor. Clinically, metronidazole injection is mainly used to treat infections caused by anaerobic bacteria, some patients in the intravenous metronidazole injection will have adverse reactions, to the digestive system, manifested as nausea, vomiting, abdominal pain, etc., but also some patients will have headache, dizziness, numbness of the limbs, itchy skin, hives and other discomforts. Therefore, the specific use of drugs need to be under the guidance of a doctor to avoid adverse consequences. As metronidazole injection has teratogenic effects in some animals, it can be widely distributed in tissue fluid after absorption in human body, and can pass the blood-brain barrier and placental barrier. Therefore, pregnant women and lactation is prohibited, patients with active central nervous system disease or blood disease is prohibited, at the same time, the use of metronidazole injection will affect the metabolism of alcohol, need to abstain from alcohol during the period of use.