Nexium 40mg is a prescription medication containing esomeprazole, available in a package of 14 tablets. This proton pump inhibitor (PPI) medication is manufactured by AstraZeneca and comes in a distinctive purple packaging. The active ingredient esomeprazole belongs to a class of medications called proton pump inhibitors (PPIs). Each tablet contains 40mg of esomeprazole. The medication comes in a box containing 14 tablets. Please consult your healthcare provider for proper dosage and usage instructions, as this is a prescription medication.