Drug Treats 'Water Intoxication' Faster, More Effectively - Results of the two largest studies on hyponatremia found that the investigational drug tolvaptan treated hyponatremia -- water intoxication -- more effectively than available treatments. These studies, presented by a researcher from Northwestern University, proved that hyponatremia can be treated with an oral drug that has no significant side effects. Hyponatremia is a relatively common electrolyte disorder. It affects a wide spectrum of patients including those with liver problems, heart failure and the elderly. It also may affect marathon runners. Thanks for link sciencedaily,com