Hello, I was having slightly higher than usual blood pressure for about 2 months (was 15/9 at its highest), and a slightly higher than usual heartbeat. I was also going through a period of stress at work. My doctor prescribed half dose of betaloc zok 50mg daily. I took it and within 2 weeks, my bp returned to its norm of 12/8 and has been stable since. It has been a month now and I feel fine but I feel that the betaloc zok sometimes does not allow me to take a full breath . I can breathe fine but if I want to take a deep breath, it feels like I have to make an effort. Could this be due to the betaloc zok (taking 25mg). Also, since this is considered a low dose, do you think I can ask my doctor to suspend the medication? If yes, do we have to do it gradually? Thanks for answering. wonderingVal