Metronidazole tablets have a certain therapeutic effect on anaerobic bacteria, trichomonas and other causes of urethritis, the use of medication needs the guidance of a physician, not to be used indiscriminately. Metronidazole is a synthetic antimicrobial drug with good antibacterial effect on anaerobic bacteria, and it can also be used for the treatment of intestinal and extraintestinal amoebiasis, and it also has a certain therapeutic effect on vaginal trichomoniasis and pouch worm disease. Therefore, it has a certain therapeutic effect on urethritis caused by anaerobic bacteria and trichomonas. Adverse reactions such as nausea, vomiting, abdominal cramps, and dysuria can occur with metronidazole tablets. It is contraindicated for people with active central nervous system diseases, blood diseases, pregnant and lactating women. Patients with urethritis need to go to the hospital in time to do relevant examinations, such as urine routine, urine culture, drug sensitivity test, etc., and then according to the results of the examination to give the appropriate drug treatment.