Hi Jeff UK and others. It has now been 3 full days since i stopped Atenolol. I stopped once but freaked out and went on a reduced dose for a few more days. Just went and had my BP checked and the reading was 130/90 that was after a long walk to the Dr.'s Clinic. It seems like my BP has stabilized but my heart is still thumping away going up to 110 or 130 beats per minute. Any idea how long this will continue. I am freaking out that this could result in damage to my heart.