@turquoise-- Actually, a proton pump inhibitor is one of the medications that my dad is taking for bile reflux gastritis. He is also taking a medication for ulcer treatment and a medication for bile buildup.
So technically, a PPI medication may help reduce symptoms of reflux gastritis. It's not really possible to diagnosed reflux gastritis by symptoms. My dad's doctor thought that he had acid reflux in the beginning as well. He was diagnosed with an endoscopy about a year after his symptoms started. He also had several acid tests to see if acid was reaching his esophagus. It was not, so that's how they crossed off other potential causes like GERD from the list.