In ancient times, the level of treatment was low, and in the face of serious diseases, all kinds of "disgusting" dirty things were often used as drugs. Such as human feces, urine, bones, etc., in addition to vomiting may reduce the absorption of poisons by oral poisoning, there should be no real curative effect.

Microbiologists have noticed that intestinal flora not only affects the health of the host, but even interferes with the behavior of the host to some extent. Although the hypothesis needs to be confirmed, it has become an important means to treat some digestive tract diseases by "fecal transplantation" to rebuild the intestinal flora of patients. Huang Longtang and Huang Deng, who have been criticized in Herbal Prescriptions, seem to have found "theoretical support", so they happily put on a gesture that "our ancestors have been waiting for you at the top of the mountain for a long time".

Huang Longtang is synonymous with old manure. The book behind the elbow treats typhoid fever, which bothers him. He said loudly that he wanted to get up and leave. Fang Yun: "If you wring dung juice and drink it several times (gě, a quarter liter) to one or two liters, it is called Huang Longtang, preferably aged." Tao Hongjing also said, "When it is hot, the more you drink dung juice. Nowadays, near the Chenghuang Temple, the mouth of an empty poppy (a container with a big belly and a small mouth) is stuffed in a dung bin, and the juice has been accumulated for many years. It is dark and bitter, and is called Huang Longtang. It is poor to cure the disease (rehabilitation). " Because of its magical curative effect, the newly revised Materia Medica is also called "broken coffin soup".

"The famous doctor Abelu" said that people "have a fever and go crazy when they take part in treatment". Drinking feces with water should be a common prescription for typhoid fever in the Southern and Northern Dynasties. According to the Book of the Northern Qi Dynasty, Shikai (a favorite minister of the Northern Qi Dynasty) suffered from typhoid fever. After the doctor diagnosed, he said, "Wang typhoid fever is extremely severe and the medicine has no effect." He should take Huang Longtang. " Shikai looked reluctant, and the flatterer next to him dared to taste it first, so Shikai also held his nose and poured dung soup, even though he was "sweating like a pig."

Mainly due to the low level of treatment in ancient times, in the face of serious diseases, all kinds of "disgusting" dirty things are often used as drugs.