The present invention relates to an improved dosage form containing, as active ingredients, epitulipinolide and costunolide extracted from the bark of Liriodendron tulipifera and, more specifically, to a dosage form for treating the gastrointestinal tract, the dosage form containing, as active ingredients, epitulipinolide and costunolide, which are the active ingredients of the extract from the bark of Liriodendron tulipifera.
