H2ORS is an over-the-counter electrolyte drink mix that reverses moderate dehydration due to illness, medical treatments, and serious exercise. Oral Rehydration Solution (ORS) was developed over 30 years ago by the World Health Organization to quickly and effectively reverse dehydration and has a near instantaneous absorption in the jejunum (second part of the small intestine). In multi-site trials, H2ORS has reduced the need for unscheduled intravenous fluids in cancer patients, and ostomates can use it daily as a hydration supplement to maintain fluid and electrolyte balance. Medicare may cover the cost of H2ORS.