Nexium 40mg is a prescription medication containing esomeprazole, a proton pump inhibitor used to treat various acid-related conditions including heartburn, acid reflux, and stomach ulcers. Each pack contains 14 tablets manufactured by AstraZeneca. Nexium (esomeprazole) works by reducing acid production in the stomach. The 40mg strength is typically prescribed for more severe cases of acid reflux disease or for healing of erosive esophagitis. The tablets come in a distinctive purple packaging with the Nexium logo and AstraZeneca branding. This medication requires a prescription and should be taken as directed by your healthcare provider. Store at room temperature away from moisture and heat.