Eighteen anti and nineteen fears are currently accepted as contraindications in the Chinese medicine community, called eighteen anti or nineteen fears. The main content is that there are eighteen drugs or nineteen drugs which, if applied in combination with each other, will weaken the original effect or produce toxic side effects. Specifically, the eighteen anti is that the half summer, guahu, mother of pearl, white creeper, white hyssop against aconite, seaweed, halberd, sweet sage, coriander against licorice, yuan shen, sage, salvia, xuan shen, bitter ginseng, pine, white peony, red peony against quinoa, this is the eighteen anti. The nineteen fears are sulfur fearing park salt, mercury fearing arsenic, wolfsbane fearing mithril, croton fearing petunia, clove fearing tulip, toothpaste fearing jing-san-ling, Chuan Wu and Cao Wu fearing rhinoceros horn, ginseng fearing wuling-ling fat, Guan Gui fearing red stone fat. The clinic should be careful with the eighteen anti and nineteen fears, some medical practitioners do not regard it as an absolute drug contraindication. There are constantly some seniors in the clinic who often use medicine to treat diseases often used eighteen anti nineteen fear, but must do a good job of careful Chinese medicine identification.