Interestingly after I started taking Prilosec OTC my arrhythmia tapered off...There are many people with benign PAC's/PVC's that are due to non-acid reflux GERD which irritates the vagus.
Hmmm...I started using sea salt and also began a calcium/magnesium/D3 supplement a year ago. my PVCs have been cut about in half. I thought maybe the PVCs were lower because I also started taking the Nexium every other day (to save money and also to reduce my risk of calcium and B vitamin loss). But maybe the sea salt has something to do with it also.
I'm in the same boat, benign PVCs, put on metoprolol tartrate 25mg twice a day. It sapped my energy, along other bad side effects. Worst part is, I still got PVCs (ectopic beats).
I quit them and I feel much better. If you've only been on them 2 days, your body is still adjusting to them and you may feel better but I doubt it.
Personally, I'm finding success reducing the PVCs with increasing my water intake and taking a dab of sea salt with each glass. Google "the water cure". Believe it or not, small amounts of sea salt may help with our problem. Good luck.