I have been taking zegerid for over a week now. I take it at before I go to bed. I had pressure on my chest before I started the medication. I haven't experienced chest pain since I started the meds. However I have been very light headed. At random times. I have also noticed about an hour after everymeal meal I experience a hard time breathing for about 2 hours. I have to take long deep breathes. I am beginning to wonder if it isn't the medication that I am taking. Has anyone else experienced this? It is becoming very irritating.