Nexium 40mg (esomeprazole) is a prescription medication manufactured by AstraZeneca, containing 14 tablets per pack. It belongs to a class of drugs called proton pump inhibitors (PPIs) and is used to reduce stomach acid production to treat conditions like acid reflux, heartburn, and stomach ulcers. The tablets come in a distinctive purple packaging with the Nexium logo and AstraZeneca branding. Each tablet contains 40mg of the active ingredient esomeprazole magnesium. This medication works by blocking acid production in the stomach. The 14-tablet pack size is typically prescribed for short-term treatment courses. The tablets should be swallowed whole with water and can be taken with or without food. This is a prescription-only medication that should be used under medical supervision.