Lanreotide is an injectable medication featuring a synthetic octapeptide version of somatostatin, a natural hormone that regulates various bodily processes. It reduces the secretion of other hormones and inhibits certain cell growth and survival, mimicking somatostatin's effects. Lanreotide is used to treat acromegaly, certain neuroendocrine tumors (NETs), and carcinoid syndrome associated with NETs, a type of cancer originating in the neuroendocrine system.