is called a beta-blocker
, which basically means it slows the heart a little so it can work more properly. first, don't stop taking atenolol abruptly, that can make your blood pressure worse. second, your blood pressure is probaly higher at the doctors office, but they should check it again in a few minutes to get a true reading. If you really want to stop taking your atenolol, tell your doctor, and yall work through it together. He may ask you to keep a blood pressure diary for a week or so to see what your blood pressure runs at different times.