I just got tired of taking it and being so worn out all the time, and my potassium was still kind of low. So I talked my doctor into taking me off of it. My BP reading has improved greatly since I started the Coreg 12.5 twice a day. But the main thing is now, I'm peeing more than ever! Could that just be the drug flushing its way out of my body? I'm drinking a lot of fluids so I don't get dehydrated and keep my bp down. No caffeine at all except a little bit in tea but that's it. I only drink water, low-calorie lemonade, sweet tea on occasion and caffeine-free sodas.