Esomeprazole 20 mg Gastro-resistant Tablets 14 Tablets is used for heart burn, acid reflux and GORD. GORD is when acid reflux remains present. It is sometimes used to avoid and treat ulcers of the stomach. Is also combined with naproxen, a drug that decreases joint and muscle inflammation and pain.Is often taken in the pancreas or intestine as Zollinger Ellison syndrome for a rare condition caused by tumour.