The present invention relates to a preventive or a therapeutic agent for hepatopathy, comprising, as an effective ingredient, a polypeptide derivative having an activity of binding to
growth hormone secretagogue receptor and thus elevating
intracellular calcium ion concentration, and having one
amino acid sequence selected from the group consisting of
amino acid sequences represented by SEQ ID NOS: 1 to 22, or an
amino acid sequence in which one to several amino acids are deleted, substituted or added at the amino acid residues other that the first to forth amino acid residues from the amino-terminus in the said amino acid sequence, or a pharmacologically acceptable salt thereof. The preventive or the therapeutic agent for hepatopathy in accordance with the present invention is useful as a
drug suitable for treating or preventing
hepatic diseases such as
hepatitis, liver
cirrhosis and hepatic insufficiency. Further, the preventive or the therapeutic agent for hepatopathy in accordance with the present invention is also useful as an agent of promoting hepatic regeneration and
hepatic function recovery after hepatectomy.