<p>It is surprisingly found out that serotonin, which is known as a nerve transmitter, closely participates in the differentiation of adipocyte precursors into adipocyte. Thus, it is intended to provide an antiobestic agent based on this finding. More specifically speaking, an adipocyte differentiation inhibitor to be used as an antiobestic agent which comprises a serotonin receptor 5-HT2A inhibitor as the active ingredient.</p>
