... sleeping, felt like i was falling of the edge of the world as i was about to drop off which would jerk myself awake. After a couple of days on this med i noticed that when i awoke in the night my heart would be racing & pounding for a couple of minutes followed by an almighty rush & burning sensation in my hands arms & feet. This is now happening every time i start to wake or turn over etc - last night about 7 or 8 times. It leaves me feeling completely shattered & exhausted every time. Going back to docs monday. I'm also on metoprolol 25mg twice a day after having 2 heart stents fitted a month ago. I've also been taking 1 or 2mg of diazapam (valium) at night to try to calm me down. Anybody else had anything like this on this med?