Rabeprazole sodium is primarily used in the treatment of gastrointestinal conditions. It is effective in managing acid-related disorders such as gastroesophageal reflux disease (GERD), where it helps reduce the production of stomach acid, alleviating symptoms like heartburn and acid regurgitation. It is also prescribed for the healing and prevention of stomach and duodenal ulcers caused by excessive acid secretion, including those associated with regular use of non-steroidal anti-inflammatory drugs (NSAIDs). In cases of Zollinger-Ellison syndrome, a rare condition characterized by overproduction of stomach acid, it is used to control acid levels. Additionally, it is often combined with antibiotics to eradicate Helicobacter pylori infections, which are linked to peptic ulcers. Its ability to inhibit the proton pump in the stomach lining makes it a key component in the management of various acid-related digestive disorders.