@gloaming Thanks so much!! 🙂 I have inappropriate sinus tachycardia, but no arrhythmia so not sure why my EP tried it. Are flecanide and propafenone supposed to lower heart rate? They do believe I have POTS, but even with the diagnosis Im not sure how that helps unless there’s different medications maybe? I’m trying nebivolol now but I think it’s making me short of breath. I think it’s most cardioselective but I haven’t heard of carvedilol. Thanks!