Rabeprazole is a medication that belongs to a class of drugs known as proton pump inhibitors (PPIs). It works by reducing the amount of acid produced in the stomach, which helps treat conditions like gastroesophageal reflux disease (GERD) and peptic ulcers. This medication is typically taken orally and can be prescribed for short-term or long-term use, depending on the patient's needs. Common side effects may include headache, nausea, and diarrhea, but it is generally well-tolerated. Always consult a healthcare professional before starting or stopping any medication.