I also have IC, and have been trying this out for a couple weeks. My symptoms were pretty much in control when I started, and I’ve actually noticed them getting even better lately. Drinking less fluids has helped me a lot with not feeling like I have to pee all the time and other bladder sensitivities.
However, I recognize this is a balance, and when I was first diagnosed it was the opposite and drinking water helped me. But I probably went overboard with the water drinking thing. I imagine you would have to find what amount is right for you. Curious to know how things are going for you now and if there is anybody else in the forum with IC?