Lactulose is primarily used in the medical field for its therapeutic benefits. It is commonly prescribed as a laxative to treat constipation by drawing water into the bowel, softening stools, and promoting bowel movements. Additionally, it is used in the management of hepatic encephalopathy, a condition caused by liver dysfunction. In this case, lactulose helps reduce the levels of ammonia in the blood by promoting its excretion through the stool, thereby improving brain function. It is also sometimes utilized in veterinary medicine for similar purposes in animals. Due to its mild and effective action, lactulose is widely regarded as a safe option for both short-term and long-term use in appropriate cases.