supraventricular tachycardia
"This drug was awful for me, I was on it 7/8 years ago when I was 13/14. I have always had normal/low blood pressure, reading sometimes normal of 120/80 but sometimes 90/60. My cardiologist put me on 25MG of Atenolol because my heart rate would reach max super quickly during exercise. I was on it for a couple of weeks before beginning to feel symptoms. I couldn't stand up without fading out. The worst part for me is that it gave me deeply disturbing intrusive suicidal thoughts that seemed to come from nowhere. I was extremely depressed and cried a lot. When I told my cardiologist of my symptoms, he doubled my dosage and put me on 50MG. I slowly weaned myself off because I couldn't take it anymore."