I was recently diagnosed with low vasopressin and my endocrinologist put me on pill form .1 desopressin a day. That was one week ago. It doesn't seem to be having any effect. My doctor said I should notice a change pretty quick... but I suspect he isn't as informed as he presents himself. I would appreciate any feedback. Also, both he and my GP seem to think I am "creating" my problem by drinking too much fluid. Anyone else heard that?