What does a diuretic medicine make you do?

I take anti—Diuretic pills to stop me producing urine due to a brain tumour at the age of 2.

swampyacres1, likewise!

One has to be aware of how well these tablets work. I remember a co-worker who went to lunch with a few people and didn't realize that she shouldn't have waited such a long time to use the bathroom. She was unable to get to the bathroom on time!