A drug used to treat gastroenteropancreatic neuroendocrine tumors that are advanced or have spread to other parts of the body. These tumors form in the stomach, small and large intestines, rectum, and pancreas. Lanreotide acetate is used for tumors that cannot be removed by surgery. It is also used to treat some patients with acromegaly (a condition in which the pituitary gland makes too much growth hormone). Lanreotide acetate is like somatostatin (a hormone made by the body), and may help stop the body from making extra amounts of certain hormones, including growth hormone, insulin, glucagon, and hormones that affect digestion. It may also help keep certain types of tumor cells from growing. Lanreotide acetate is a type of somatostatin analog. Also called Somatuline Depot.