Son is on DDAVP for injuries rceived several years ago. and med. seem to be having less help to him, leaving his electrolytes in a unbalanced state. He has been on this for 6-7 Years now and it doesn't seem to have as long as a lasting effect on him, is there a new treatment that could be more effective than the DDAVP? or some new treatment. (accident envolved his Adrenial gland which dr. stated that 1/2 his gland was no longer functioning received in auto crash -head injury) I need help or some info.---I pains me to see him suffer and I don't know what else to do, for he's up all night drinking anything he can then he's all day in the bathroom throwing up or has diarreah(Misspelled)