I took Atenolol for 6 months and during that time I experienced terrible anxiety attacks. It got so bad I would not leave my home. I talk to my doctor and he said he had not heard anything about this kind of side effect from this medication. Well I am no longer on Atenolol and the anxiety attacks have stopped. I wish I had known about this before I started taking it. I lost my job over the terrible side effects from this medication,