Hi! Great questions. I am on Metoprolol Succinate, too. Question....how long have you been taking it? I have been on it for 2 years. Had the same symptoms. However, with time, the side effects dissipated. My resting HR is in the low 50s. Sleeping HR goes in to 40s.

I'm thinking the medication will cause the fatigue and other symptoms. Especially if you haven't been on it for 6 months to a year. I speak with people who are athletes and they aim for their resting HR to be in the high 50s. Your sleeping HR is really good.

I wouldn't worry too much about it. Unless the symptoms are interfering with your ability to function and daily life, I feel you're OK. Speaking from a long heart journey of medication games and tachy-brady syndrome I was diagnosed with. Took over 2 years to sort it out. Have had scares of when my HR dropped to the low 20s and increased to 150 when I was resting. Found out I had arrhythmia after open heart surgery. Ended up having ablation to fix arrhythmia. Doesn't sound like you have arrhythmia at all. You don't want a pacemaker unless absolutely necessary. Doesn't sound like you're a candidate for one.

Again.... how long have you been on the metoprolol? Also.... do you take it with food. The side effects of that beta blocker are a nightmare without food. It will tank your heart rate. Take with food if you're not already.

Hope this helps. Stay strong, heart warrior ❤️