Four kinds of poisons, namely morning medicine, Hedinghong, Lycium barbarum and poison, are all harmful poisons in ancient or martial arts novels. These three poisons can kill countless people and ensure that people have a complete body when they die, so they are often used to kill people with higher status. Dragging medicine is actually nux vomica. This plant is rich in brucine and brucine, which can kill people. The dead man's head was drawn, his hands and feet were bent, and finally his head and feet were bent, and he died like a tractor, so he named the nux vomica Tuyao.

Petty bourgeoisie medicine is usually used to deal with people with high status. These nobles can't give up on themselves by beheading in public in the city or being executed in the middle of the year. Therefore, giving medicine to the deceased indoors can protect the dignity of the deceased to the greatest extent. Emperor Qianlong gave Wan morning medicine, which fully showed that Qianlong killed Wan, but Wan was a harem concubine after all, and he and Qianlong were husband and wife. If she is found guilty and killed in the city, the royal family will lose face. Therefore, Emperor Qianlong chose to poison Wei and let her atone in hell. Later, when Wei's son became emperor, that is, Emperor Jiaqing, he conferred the title of his mother Wei as the Empress of Pure Filial Piety!

Since the morning medicine came out, many emperors, generals and ladies-in-waiting have been poisoned, and Wei is not the first nobleman to taste this medicine. According to legend, both husband and wife lived in Tokyo after Li Yu, queen of the Southern Tang Dynasty, fell to the Song Dynasty. Song Taizong Zhao Guangyi had long coveted the beauty of Li Yu's wife Zhou Xiao, so she felt lucky for Zhou Xiao, but Li Yu was very sad afterwards and dared not tell anyone. From then on, Zhou Xiao was often called to the palace by Zhao Guangyi to talk. Li Yu wrote after drinking: When is the spring flower and autumn moon? What do you know about the past? The small building was easterly again last night, and the old country could not bear to look back on the moon. Carved fences and jade bricks should still exist, but Zhu Yan changed them. Ask how much sorrow you can have, just like a river flowing eastward. After hearing this, Zhao Guangyi gave Li Yu a morning medicine to avoid future trouble, and occupied Zhou Xiao for a long time.

Hemlock red is impure arsenic trioxide, commonly known as arsenic, red, also known as alum and red arsenic stone, which is highly toxic. Wu Dalang was poisoned by Pan Jinlian and He Dinghong. He Ding Hong is the first poison in martial arts novels, and it is also the first poison for the emperor to give his etiquette to death and prepare for suicide. After arsenic trioxide enters human body, it will combine with sulfur groups in protein, which will denature and inactivate protein, which can block the way of intracellular oxidation energy supply, and then lead to rapid death. Although the process is painful, it is relatively fast, and there is still a whole body after death.

"Mu Cao Primitive Man" contains, "If a bird is poisoned, it will die of numbness and anxiety; If a dog is poisoned by it, it will die of a broken heart. If taken by mistake, it will cause contracture of limbs. " So once people take it, the consequences are terrible.