@howard137
I don’t know if my experience with Metoprolol relates to yours, but I asked to try a different med for NSVT when Metoprolol prevented me from exercising without getting quickly short of breath. It simply prevented an increased heart rate which in turn prevented the necessary additional oxygen supply required to sustain exercise. I also believed Metoprolol was negatively affecting my sleep quality.
I was switched from Metoprolol to a calcium channel blocker called Verapamil- a long-acting capsule once a day in the morning. It will lower blood pressure( although I don’t need it for that function) so that needs to be watched. The top number( systolic ) should not drop below 100.
Sleep has improved too.
Maybe a med change would help you too. Good luck!