A synthetic long-acting octapeptide analogue of endogenous somatostatin. Octreotide pamoate binds to somatostatin receptors expressed by some neuroendocrine and non-neuroendocrine tumor cells, thereby initiating somatostatin receptor-mediated apoptosis. Other possible antineoplastic activities of this agent include suppression of tumor angiogenesis and tumor growth-promoting insulin-like growth factor 1 (IGF-1). Check foractive clinical trials using this agent.