Yes it is SIADH. And yes I was drinking at least 60 oz of JUST WATER. That of course was to keep the mucus thin to be able to cough up easier. I was never told by anyone you can drink to much liquid!!! All I was told was stay hydrated. And of course 60 oz. Means ALL LIQUIDS, soups, coffee, juice, etc.

How much daily total water do you need? For healthy individuals, the average daily water for men is about 15.5 cups and for women about 11.5 cups. That might mean you need only four to six cups of plain water, depending on other fluid sources such as coffee, tea, juice, fruits, and vegetables.

The above is directly from Cleveland Clinic web site.