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Thanks sqad. I drink loads of water, always have. No, I take them because I had a very fast heart beat and had to go into hospital to be monitored twelve years ago. Thats when I was put on Bisoprolol. I tried cutting one in half and my heart was racing, my blood pressure improved slightly. My doctor knows I have low blood pressure and likes me to monitor it regularly. I'm on holiday next week, so when I get back , I will monitor it again and if no improvement will let Dr know.