MSFinals-1328

A 62-year-old retiree comes to the clinic with complaints of abdominal pain and bloating. He reports recurrent belching after meals and a loss of taste for Chinese food, which he used to enjoy. This has been ongoing for the past 8 years. The patient had an upper GI endoscopy 6 years ago, which was reported as normal. He has tried various over-the-counter remedies and was prescribed medication by his primary care physician, but with little relief. What is the next recommended course of action for this patient?