Metronidazole is an antibacterial drug of the nitroimidazole class. Metronidazole Injection is used intravenously for the treatment of severe Trichomonas vaginalis infections and anaerobic bacterial infections, and is a frequently used drug in gynecology. When intravenous metronidazole injection should be noted: it should be prohibited for those who have a history of allergy to this product and other imidazole drugs; it is prohibited for breastfeeding women and women within the third trimester of pregnancy, patients with central nervous system diseases and blood diseases; during intravenous metronidazole injection must pay attention not to drink alcohol, so as not to cause disulfiram-like reactions, manifested as facial flushing, fever, headache, nausea and vomiting, etc. In severe cases, there may be In severe cases, dyspnea, tachycardia, decreased blood pressure, irritability and even life-threatening effects may occur. Long-term use of the drug may affect the liver and kidney function, and regular review is required.