A 59-year-old man comes to the physician for a 3-month history of burning in his throat that is worst after meals. He has type II diabetes mellitus managed with insulin. HbA1c is 12%. Physical examination shows diminished sensation over the lower extremities. Which of the following is the next best step in management?
2-week trial of omeprazole
Erythromycin
Esophagogastroduodenoscopy
Metoclopramide
Scintigraphic gastric emptying assay
