I'm so happy you are smiling
Beta blockers as Kitt explained keep your heart rate down and yes, help keep you calmer. I hope this continues for you.
I took effexor xr (I think same thing) and it gave me a bit of tummy troubles and dizziness for a few days but it certainly didn't make my anxiety worse. I'm terrified of trying new meds, but this one was really okay for me. Just my 2c!!
Stay well and keep smiling!
Panic Attack Survivor
Weekend Warrior Princess