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".