Just to complicate things
You do need to know that there is an association with taking proton-pump inhibitors long term and an increased risk of osteoporosis. Since I have both GERD and osteoporosis I've been following this developing story. It may be that by lowering the amount of stomach acid, you reduce the ability to absorb calcium. Be sure to ask your MD about this problem, and discuss your risk factors for osteoporosis. Currently, it is suggested that calcium citrate may be better absorbed than calcium carbonate if you a taking a proton-pump inhibitor. Also ask about the timing of calcium doses and GERD meds.