However I was unable to cope with the number of these, and have been taking a small
dose of atenolol daily since (12.5mg, one tablet cut in half). I'm now 6 weeks pregnant, and tried to stop taking them but couldn't. When I did, I was horribly anxious and couldn't cope. I also experienced sleeplessness, tachycardia and the sensation of feeling my hearbeat all the time. I was in constant tears and couldn't work or do anything at all.