Eluxadoline is primarily used in the treatment of irritable bowel syndrome with diarrhea (IBS-D) in adults. It works by targeting specific receptors in the gut to reduce bowel contractions and fluid secretion, which helps alleviate symptoms such as abdominal pain, urgency, and frequent bowel movements. This medication is particularly beneficial for patients who have not responded adequately to other therapies. It is typically prescribed as part of a comprehensive treatment plan that includes dietary and lifestyle modifications. Patients are advised to follow their healthcare provider’s instructions carefully to manage potential side effects and achieve optimal results.