... until I can see a urologist. I am a 50 year-old female. It is now 12/9 and am urinating much more than I'm taking in. (900 CCS within 5 hours last night). This started yesterday and is just as bad today. I've lost 2.5lbs since Saturday. Is this a normal output for someone who has been catheterized and given Flomax? I'm urinating far more than I'm drinking. Does Flomax cause you to lose fluid retention in the rest of your body? Any answers would be appreciated