Alvimopan is used to help restore normal gastrointestinal function after bowel surgery. It is commonly administered in hospital settings to shorten the time it takes for patients to have their first bowel movement following a surgical procedure. This medication works by blocking certain receptors in the gut that are affected by opioid pain medications, which often slow down bowel activity. By counteracting this effect, alvimopan supports faster recovery of digestive function without interfering with pain relief. Its use is typically limited to short-term treatment in controlled clinical environments.