Is loss of appetite a common symptom of GERD. I have recently been put on Lansoprazole by my GP as a first step towards diagnosis of possible GERD (all my simptoms fit); however, it is not the medication that is causing my loss of appetite because this is one of the first things I noticed a few weeks ago, along with the other symptoms. It is unusual for me to lose my appetite. I am feeling hungry later on in the afternoon but am eating nowhere near what I used to. This has been the norm for a few weeks now.