Dear Dr. Roach: I have had gastroesophageal reflux disease ... He put me on 40 mg of omeprazole once a day and said he would do another endoscopy in four months to see if it healed.

Dear Dr. Roach: I am a 75-year-old woman in very good health with the exception of my Barrett’s esophagus, which I have had for five years with no dysplasia. My gastroenterologist had prescribed ...