Nexium 20mg is a prescription medication containing esomeprazole, available in a package of 14 tablets. It belongs to a class of drugs called proton pump inhibitors (PPIs) used to reduce stomach acid production. This medication is manufactured by AstraZeneca and comes in a purple-colored box containing 14 tablets. Each tablet contains 20mg of esomeprazole as the active ingredient. As this is a prescription medication, it should only be taken under the direction and supervision of a healthcare provider.