Well, yes, it is normal not to hold water after you drink it, but, usually it takes about an hour or so for it to be excreted. Sometimes, if a person's body is not used to having a lot of water in it, it will actually hold on to it until it realizes it will not be deprived of it anymore, after that however, it will release it fairly fast. I would not worry too much, but, just drink 8 ounces about every hour, this way, it distributes it evenly and you never have too much or too little.