Betel nut is the dried mature seeds of Betel nut (Betel nut) of the palm family, with the effects of anthelmintic, elimination of stagnation and circulation of qi, and is used as a treatment for intestinal parasites, oedema, and stagnation of food (food that is indigested and stagnates in the stomach), etc. It has no eye-opening effect. Betel nut does not have the effect of improving eyesight. Betel nut is bitter and pungent, and can be used to kill worms, as well as laxative, can be used to kill a variety of intestinal parasites; this product is good at moving the stomach and intestinal congestion of qi, the stomach and intestines, stagnant qi, fecal disorders (stool abnormalities), or abdominal bloating constipation, or diarrhea and dysentery after the weight of the application of the same person. This product has the effect of favoring water and promoting the flow of qi, and can be used for edema, swelling and pain in the feet. It can be used with Shangluo, Mutong and Ze Xie if it is used in the treatment of oedema with adverse bowel movements. This product also has the effect of intercepting malaria, can be used for the treatment of malaria cold and heat, can be used with Houpu, Changshan, grass fruit and so on. The adverse effects of betel nut are not clear. This product has the effect of diarrhea, and easy to consume qi, so the spleen deficiency loose stools (feces thin not shaped) or qi deficiency sinking people should not use; pregnant women should be cautious to use. If you need to use the drug, it should be used under the guidance of a doctor, do not blindly self-medication.