I have paroxysmal AFib that has been controlled with two ablation procedures. However, on some days I experience lots of PACs and other palpitations that affect me adversely. When that happens, I take a low dose of nebivolol -usually half a 2.5 mg tablet. This calms my heart and improves the way I feel. I keep a nebivolol tablet with me wherever I go. Nebivolol used in this way doesn't cause me adverse side effects, such as excessive tiredness, which are often the result of other beta blocker meds such as metoprolol.