Hi. I am just wondering if anyone else has this problem? I was diagnosed with PA 4 years ago and had B12 jabs every 3 months until last November when I was started on 6 weekly jabs as I was soooo tired all the time. Since having them more frequently I am suffering badly with excessive burping (even after a glass of water) and wind which is extremely unpleasant no matter what I have eaten. Is this common?