Oral versus intravenous rehydration for treating dehydration due to gastroenteritis in children Hartling L, et al. - Oral rehydration should be the first line of treatment in children with mild to moderate dehydration with intravenous therapy being used if the oral route fails. The evidence showed that there may be a higher risk of paralytic ileus with oral rehydration while intravenous therapy carries the risk of phlebitis (ie inflammation of the veins) [more...]