Hoping this might help someone out there. When I have AF episodes I take Metatone. For those of you old enough to remember as children being given a tonic to help get over minor illnesses this is the one my parents gave me. It is basically vitamins and minerals and really helps with aching muscles after exertion during AF episodes. Also if you pee a lot during AF - a recognised symptom - it helps replace the minerals. It is relatively cheap, it comes in liquid form so not yet another tablet, and is available over the counter. Worth a try.