Child Specialist Ghaziabad. Does my child need antibiotics to recover from diarrhoea. Antibiotics therapy is mostly not necessary to treat diarrhoea in children as most diarrhoea episodes are caused by viruses, which do not killed by antibiotics. Most cases of diarrhoea are self limiting regardless of causative facror. Inappropriate use of antibiotics neither reduces the severity of diarrhoea nor shorten it's duration.