Origin: Eighteen anti-Confucianism was first seen in Zhang's Scholars.
Song formula:
Materia Medica clearly states eighteen opposites.
Half-baked shellfish and attack Wu.
Algae, halberds and scorpions compete for grass.
Ginseng shoots betray Veratrum nigrum.
Explanation:
The first sentence: Herbal medicine clearly points out the incompatibility of eighteen kinds of drugs.
Second sentence: Semi-(Pinellia ternata) Fructus Trichosanthis (Fructus Trichosanthis, Trichosanthis Radix), Bulbus Fritillariae Cirrhosae, Radix Ampelopsis, and Rhizoma Bletillae [1] are opposite to Radix Aconiti (Radix Aconiti Kusnezoffii, Radix Aconiti Lateralis Preparata).
The third sentence: seaweed (Sargassum), Euphorbia (Euphorbia), Daphne genkwa (Daphne genkwa) and grass (Glycyrrhiza uralensis) are not harmonious.
The fourth sentence: Ginseng (Ginseng, Radix Codonopsis, Radix Adenophorae, Radix Scrophulariae, Radix Sophorae Flavescentis, Radix Salviae Miltiorrhizae), Asari, Radix Paeoniae Rubra and Radix Paeoniae Alba are opposite to Veratrum nigrum.
Ancient and modern Chinese medicine practitioners used the above taboo principle when prescribing drugs.