Esomeprazole is a medication that belongs to a class of drugs known as proton pump inhibitors (PPIs). It is primarily used to reduce the amount of stomach acid produced, helping to treat conditions like gastroesophageal reflux disease (GERD) and stomach ulcers. By decreasing acid production, it alleviates symptoms such as heartburn and discomfort. This medication is available in various forms, including tablets and injections, and is typically taken once daily. Common side effects may include headache, nausea, and diarrhea. Long-term use should be monitored by a healthcare professional to avoid potential complications.