Hiccup is a common clinical symptom, and may be caused from over 100 medical origins. Generally hiccup happens temporarily, and continues only a few seconds or minutes, and is cured easily by physical methods or even by itself. But in some cases, hiccup is so refractory that patients may be tired and very troubled by it. At worst, it may cause death. Intractable hiccup is defined as hiccup persisting for more than 48 hours, and this appears in various diseases. Persistent hiccup is very difficult to treat by conventional methods. A 69-year-old man was admitted due to intractable hiccup without gastroenteral system abnormalities or peripheral nervous systemic involvement. So Paljung-san(八正散) was prescribed. The intensity and frequency of hiccup dramatically improved.