i was on propanolol for a year 3 x10mg a day ,,i stooped cause i had to change to atenolol for high bp,anyway to cut a long story short i had to stop atenolol cause my bp was too low,So i went to docs and he put me back on propanolol cause my pulse was racing and i felt horrible ,head rushes ,kind of dizzyness and palpatations etc ,he told me to take 40mg once a day but being me i was too scared incase it stopped my heart lol,anyway on xmas eve i saw my doc again and my pulse was 120 and bp was 120/80..my pulse she says was just my anxiety and i told her i thought it was my heart going into failure but she said my pulse was good and strong ,so she told me to take 10mg twice a day,,but its making me tired and kind of twinges of pain in my chest at times and i get a feeling like i cant breath right ,,is this just my anxiety,,,,oh god why cant i just be normal.