Rabeprazole is a type of medication known as a proton pump inhibitor, or PPI. It is used to treat conditions caused by too much acid being produced in the stomach, such as heartburn, ulcers, and gastroesophageal reflux disease (GERD). It works by reducing the amount of acid produced in the stomach, which helps to relieve symptoms and promote healing. Rabeprazole is available in both prescription and over-the-counter (OTC) forms. Prescription rabeprazole is usually prescribed to treat more severe cases of GERD, while OTC forms are used for milder cases. It is typically taken once or twice a day, depending on the severity of symptoms. The most common side effects of rabeprazole are headache, nausea, and diarrhea. Rabeprazole is generally considered safe and effective. However, it is important to talk to your doctor before taking it, as it can interact with certain medications and supplements. It is also important to take the medication as prescribed, as taking too much can cause serious side effects. Overall, rabeprazole is an effective treatment for conditions caused by too much acid in the stomach. It is important to talk to your doctor before taking it, as it can interact with certain medications and supplements.