Eating metronidazole urine color becomes darker, most is due to metronidazole metabolites with the urinary discharge, and a small portion is due to abnormalities in kidney function. Metronidazole is metabolized by the kidneys, most of the metabolites will be excreted with the urine, so it will cause the urine to become red or brown, the phenomenon of deepening the color of the urine, is generally a normal phenomenon, there is no need to panic. Generally in 2-3 days after stopping the use of metronidazole, metronidazole metabolites completely metabolized, the color of urine will return to normal. If the color of urine is not normal after stopping metronidazole, it may be caused by abnormal kidney function, urinary tract infections and other urinary tract diseases, it is recommended to consult a doctor in time to clarify the cause of the disease.