Nexium 20 mg is a prescription medication containing esomeprazole, available in a pack of 14 tablets. It is manufactured by AstraZeneca and comes in a distinctive purple packaging. This medication belongs to a class of drugs called proton pump inhibitors (PPIs). The active ingredient esomeprazole works by reducing acid production in the stomach. Each tablet contains 20 mg of esomeprazole. The package contains 14 tablets for oral administration. Always follow your healthcare provider's instructions for proper dosage and duration of treatment.