Nexium 40mg tablets contain esomeprazole, a proton pump inhibitor used to reduce stomach acid production. Each pack contains 14 tablets manufactured by AstraZeneca, indicated for treating conditions like acid reflux, heartburn, and stomach ulcers. Nexium (esomeprazole) works by blocking acid production in the stomach. The tablets should be swallowed whole with water and can be taken with or without food. The standard dosage is one 40mg tablet daily or as prescribed by your healthcare provider. The medication comes in a distinctive purple packaging with the AstraZeneca logo. This is a prescription-only medication that should be used under medical supervision.