I suffered from reflux oesophagitis on and off for many years (since a child) without knowing what it was or even that it could be treated. Eventually my wife (a nursing sister) convinced me to take advantage of the company-provided BUPA and get it checked out. Following gastroscopy (under sedation) and an xray (barium meal and swallow) I was diagnosed with hiatus hernia. Subsequent treatment with one 20mg Losec (omeprazole) a day has kept me symptom-free for twenty years.
Declared this to my AMEs (I used two different ones randomly) and was told 'not to worry, it's not a problem for flying'. I don't drink Stella but I do still enjoy a curry!