Is it true that ppl who have gerd are more likely to suffer from anxiety and depression, despite being on gerd meds such as ppis & antiemetics?

Stress causes all!: We don't know which may cause the other but they do frequently occur in the same patients. Anxiety may lead to gerd and not being able to get either controlled can lead to depression. However, each often occurs alone so it isn't a clear case of any one of the 3 causing the other. That said, large amounts of stress can cause any one or all three.