Become dehydrated very quickly even drinking 4 liters of water a day. iv fluids once a week (3liters in about an hr). causes? tips?

Dehydration: You definetly seem to have a problem. You may have diabetes insipdius (di) or hyperglycemia causing you to have an osmotic diuresis. I assume that the IV fluids were given to you in an er, was blood taken and did you descuss your problem with ter doctor? Go to the er and get some blood work to get answers to your questions, as soon as possible, .