Atenolol
"Let me start off by saying that I've done my research on Atenolol--it doesn't have the greatest track record, and there's a lot of evidence coming out saying that it doesn't actually protect your heart or arteries from damage.

But Atenolol is the only thing that has worked to control my heart. I used to have high BP (160/100) and tachycardia at times, but as soon as I started taking Atenolol, it was like I was normal again. And I can definitely tell a difference when I stop taking it.

I get a little shortness of breath very infrequently and my pulse is sometimes under 60bpm, but it's the one drug that has worked for years. I wish I could find something better/more effective, but I haven't yet. Tried Losartan, Vasartan, and a few others."