Hi, I had gone through your question and understand your concerns. Metronidazole is a prescriptional drug used for specific indications only, it in one of most misused drugs in diarrhoea . It should not be used unless prescribed by a doctor , moreover most diarrhoeal episodes are self limiting , take care of hydration by frequent feeding, use of ORS and zinc , if baby is active , passing urine normally , accepting feeds normally , it will resolve in 2- 3 days, otherwise do consult your health care provider to decide further course of action . Hope this answers your question. If you have additional questions then please do not hesitate in writing to us. *Always check for history of allergy before taking any medicine. Wishing your baby a speedy recovery . • DISCLAIMER: - All the information provided here is for information purpose only , it is not a substitute for the advice of a physician after physical examination , it is not intended to replace your relationship with your doctor. This information in no way establishes a doctor-patient relationship. Before acting anything based on this information do consult your doctor. I recommend that online users seek the advice of a physician who can perform an in-person physical examination