Toprol-XL and shakes

50 yr old female ( gasps @ 5-0 still)

I've been on ToprolXL for some time now. I started with Tenormin and felt FINE! The doctor then decided it was not the 'right medicine' for me and changed me to a 'new and better medication' names TOPROL XL, He started me on 50mg a day. I had experienced rapid heart beat of at least 150 bpm up to 200! My heart had to be stopped in the ER to get it back to being a normal rhythm. At the time I was 39 yrs old :( SCARY! I had every test imagined. Heart tests, lung and leg scans. You name it, I had it done to me ( thankfully, to make sure it was nothing serious). Although I do consider a heart beating that high to be serious! I already have a anxiety disorder, I noticed that my panic attacks are worse now more than ever! I am very very lethargic. Just thinking about doing ANYTHING makes me tired. I even getting tired when I talk too much! My mouth is always excessively dry. I put on weight and even paid for a diet that consisted of 2 'shakes' and one meal per day. Followed it to the "T"! and nothing ?! I've recently read that ToprolXL can lead to all kinds of diseases. One of them being Lou Gehrig's (ASL) :( I am SO very upset that medication is prescribed supposedly to make a person feel better AND I don't think I've physically felt this depleted and depressed in years! I want medical answers and I need support and words of encouragement from everyone that has been on this drug , most especially those weaned off ot it and are on a better drug. Most of the people I notice taking TOPROL XL are taking it fro HBP or symptoms other then the one's I have. I am SO confused now :(

I think it cause shakes and trembling for me,I started it in the end of august on toprol generic December I started shaking. and trembling.I have had thyroid checked ,brain scan plenty of blood work every thing checked out..