Rabeprazole capsules are indicated for the treatment of gastroesophageal reflux disease (GERD) and other conditions related to excess stomach acid production, contraindicated in patients with known hypersensitivity to rabeprazole or any component of the formulation, common side effects may include headache, nausea, and diarrhea, and potential drug interactions may occur with medications such as warfarin, methotrexate, and certain antiretrovirals, which can affect their metabolism.