Generally, after taking metronidazole, alcohol should be consumed only after 7 days of discontinuation of the drug. Metronidazole belongs to the class of nitroimidazoles and is mainly used for the prevention and treatment of infections caused by anaerobic bacteria, such as urinary tract infections, gynecological inflammation and mouth ulcers, and is a broad-spectrum antimicrobial agent. If alcohol is consumed during use and within 7 days of discontinuation, or if alcoholic beverages are consumed, it may cause a disulfiram-like reaction, causing patients to experience uncomfortable symptoms such as flushing, rapid heartbeat, abdominal pain, headache, dizziness, etc. In severe cases, shock may even occur, endangering health. In addition, alcohol may also affect the metabolism of metronidazole in the body and reduce the effectiveness of the drug. To avoid accidents, patients are advised to stop taking metronidazole for 7 days before drinking alcohol. During the medication period, patients need to pay attention to maintain a relaxed mood, eat a light diet, and avoid eating cold, spicy and stimulating foods.