Re: DX Barrett's Esphagus
Barrett's esophagus is generally not considered an emergency. It should be treated, because it could over the course of years turn to cancer or esophageal strictures, but that's not something that's going to happen overnight, and most people with Barrett's never develop those complications.
See what happens with the medications. There are also diet and lifestyle changes that should be tried. The focus is on controlling symptoms and letting the esophagus heal. It typically takes a couple months for a drug like Protonix to produce healing in the GI tract, which is presumably why they want a follow-up endoscopy in 7 weeks.
Best of luck to your relative!