I'm so glad to hear someone else think the same. I never had heartburn symptoms until after being on the PPI's. I've been in a downward spiral for 10 months, seeing diff doctors. All of them putting me on a different one, with greater doses.
I kept hearing the same thing, but could never find it anywhere. No doctor has ever heard of it that I've spoke too. However, 2 weeks ago I found it on the mayoclinic website. www.mayoclinic.com. If you do a search for NExium, or most any of the other PPI's, they will list heartburn as a symptom!
I of course have no proof that this is my problem, but am trying to get off of them to see. I've had chest pain 24X7 for 8 months. It is getting worse and is in my back between my shoulder blades. I've also lost 40 lbs since I've been trying to eat small amounts and the "right" kind of things. Nothing is phasing this thing, no foods, no medicine, sleeping inclined, stopped exercising. I'm about at the end of my rope.