Eighteen anti-nineteen fears refers to not allowing some drugs to be used together, as the consequences of combined use will produce various side effects. In ancient times, the Eighteen Anti-Nineteen Fears generally referred to the names of various drugs that could interact with each other, and were summarized and compiled into formulas in the Jin and Yuan Dynasties.

Nineteen fear proverbs:

Sulfur is afraid of saltpeter, mercury is afraid of arsenic, wolfsbane is afraid of the miter monk, croton is afraid of the morning glory, lilac is afraid of the turmeric, Sichuan black and grass black are afraid. Rhinoceros horn, tooth salt are afraid of three edges, Guangui is afraid of red stone resin, and ginseng is afraid of Wulingzhi.

Sulfur is originally the essence of fire, and Pu Ni and Ni will fight each other as soon as they see it.

Don’t mix mercury with arsenic; wolfsbane is the most feared by Mi Tuo monks.

Croton has the strongest temperament, but does not get along well with morning glory.

Don’t meet lilacs with tulips, and it’s hard to match the three edges of your teeth.

Sichuan Wucaowu is not suitable for Rhinoceros, and ginseng is most afraid of Wulingzhi.

Guan Gui is good at adjusting the air conditioner, but if he meets Shi Zhi, he will bully him.

Generally, when cultivating together, we should look at prosperity and adversity. Don’t depend on each other when it comes to gun, fire, fire and fire.

The records in later books such as "Compendium of Materia Medica" and "Yaojian" have slight discrepancies, but they are not as universally recognized and spread as the chanting of the Eighteenth Antithesis and Nineteenth Fearful Song.

The compatibility of Chinese medicine drugs is divided into: mutual support, mutual support, mutual fear, mutual hatred, mutual killing, and opposite. Therefore, the term "eight antis" refers to two drugs that are opposite to each other.

Baidu Encyclopedia-Eighteen Years Against Nineteen Fears