I have been taking Omeprazole 40mg once a day for the past 5 years. prior to that I was taking Protonix 40mg for 6 years. in all I have been reflux free for the past ten years. the initial pain which caused me to see a Gastroenterologist was severe cramping in my chest mimicking a heart attack, I suppose. my concern is a commercial I have seen a number of times citing possible Kidney Failure, or other severe possible life-threatening effects from prolonged use. I want to stop due to what these commercials are stating, but I am not sure other than possibly experiencing discomfort what could happen if I stop, like developing Esophical Cancer, I am a 63 year old male in otherwise perfect health. I weigh 195 and stand 6 2. just had a physical and all of my vitals are fine. Please let me know what you think about the study, and suggestions for my concerns, Thank you, Frank Campili