 [ Symptoms ] what causes the rashes from poison ivy oak and sumac [ Disease ] most helpful answer i do not know much about arrhythmia but it sounds like the medication might be too strong if you are urinating a lot and very aggressively i suggest you drink heaps of water otherwise your blood volume will drop and you will experience angina light headedness may even experience peripheral arterial disease meaning you may get light headed when you walk up stairs or power walk also take large breaths to increase oxygen intake to avoid these symptoms my suggestion other than the obvious visit your local gp general practitioner they should be able to identify the issue you could have another form cvd for all i know which could completely eliminate the purpose of arrhythmia medication