I developed "silent GERD" from one med. The symptoms scared me. It started out with feeling like I had a lump in my throat all of the time. I was cutting more and more foods out of my diet because the "lump" feeling would get worse with certain foods. I googled obsessively. Some of the online info helped; a lot of it terrified me. After about 9 months I was so fearful that I just walked into my GP's office one day and told them I had to see her. Well, she suggested that my condition was most likely a med side effect. She prescribed Prilosec. I took it for about a month or two and the scary symptoms went away.

It seems to me that I have also had heartburn in the past as a side effect.

One thing I will add. For whatever reason, OTC Prilosec did not help my GERD at all. Even though the prescription appeared to be the same medication, it helped.