I know that if you experience heart palpitaions B vitamins (i think b6) is suppose to help. I seem to have the opposite happen to me. I maybe wrong, but it seems every time I take B I get heart palpitaions. It's like a flip or a kind of flutter in my chest but it also takes my breath away and makes me cough. I have had it checked out by a doctor. He did an EEG witch did show an irregular rythem. He then had me where a 24 hour haulter and did a echo of my heart. Both came back normal. Once I stopped the B it went away. Has anyone else had this happen to them?