The present invention relates to a pharmaceutical composition for preventing, ameliorating, or treating
anorexia and
weight loss, comprising a Bupleuri Radix extract. Specifically, the present invention provides a pharmaceutical composition having effects in preventing, ameliorating, or treating
anorexia and
weight loss, wherein a Bupleuri Radix extract increases ghrilin, which is a
hormone that stimulates
appetite, and decreases TPH1(I), which is a
serotonin synthase. In addition, a health
functional food for preventing or ameliorating
anorexia and
weight loss, comprising a Bupleuri Radix extract, can be developed, and the extract can be effectively used for the treatment and the development of therapeutic agents for anorexia induced by
chemotherapy in the future.