Nexium 20MG Tab contains esomeprazole, a proton pump inhibitor medication that comes in a pack of 14 tablets. Each tablet contains 20mg of the active ingredient esomeprazole, manufactured by AstraZeneca. Nexium (esomeprazole) belongs to a class of medications called proton pump inhibitors (PPIs). The medication works by reducing acid production in the stomach. This product contains 14 tablets in a purple-colored box, with each tablet containing 20mg of esomeprazole as the active ingredient.