You're taking OmegaVia 500, right? That's about as good as a DS version of V you're going to get - and the odd fluttering and chest pain is likely Afib - R-IT showed a stat sig increase in V patients, something like 1.2 out of 100 patients experienced Afib, but I have to say I'm surprised at 2 g/day I'm surprised it's due to EE-EPA. Perhaps you're a rapid metabolizer? Is there a time after dose correlation or do they occur at any time of the day? I'd stop it entirely if I were you and see if the flutters go away. It would be a shame if you couldn't take EE-EPA, because it did magical things for my chronic back pain and stiffness - I had also been treating it with long term ibuprofen use which wrecked my GI tract over time - now I'm almost allergic to it, causes severe GI stress if taken more than two days in a row, which sucks when I suffer a real injury involving acute inflammation and trauma - V ain't any good for that.