From my understanding Beta Blockers do not stop palpitations. They only help with any side effects and my them a little less noticeable by decreasing your heart rate and my your heart not have to work so hard, therefore, the thump that you get won't be so hard. So maybe you should pay attention to the harshness of them now that you have been on them. I take metoprolol for tachycardia and pvcs and in my case it does make them less noticeable although I still have them. Also consult your cardialogist, he may have a different drug for you. Its better to be safe than sorry when it comes to the heart.
Best under the supervision of your doctor,,,,,,but I've noticed that extending the time between doses is helpful too, or if you only take one dose a day, the next day take it an hour or two later, and so on and so on.
I (my doctor) change my Motoprolo regularly and I don't seem to have any ill effects from the change. For example I went from 100 mg twice a day to 50 mg twice a day, but then my heart rate went up and I went to 100 and 50 and now back to 100 and 100mg. Other than the usual side-effects which we all complain about my up/down dosage doesn't seem to have any other side effects.
I do understand one should not abruptly stop taking and I don't know what that means in terms of how many days at what dose before one goes to zero.
I have weaned myself off my bb after being on it for 20 years. I went back on because my tachycardia came right back, but I did it. I am not saying that you SHOULD do this on your own. It is always adviseable to see your cardiologist to tell you the safe way and do it under their guidance. But you CAN call them on the phone. I am sure they can tell you. Usually cutting down 25 mg a week or so is the best way, but I would give them a call, at least. They may tell you something different.