Nexpro 20 is an anti-ulcer medicine which contains Esomeprazole Magnesium. It is used to treat stomach and intestinal conditions like peptic ulcers (sores in the lining of your stomach and intestine), esophagitis (swelling of your food pipe), and gastroesophageal reflux disease (a condition in which the stomach acid flows back into your food pipe), etc. It also relieves stress ulcers (sores in the stomach and intestine that may occur due to illness, infections, etc.) and acidity caused due to the intake of painkillers. It works by stopping the excess production of acid in your stomach.