“相反”是《神农本草经》药物七情理论之一,已流传一千八百余年,通称十八反。但历代对相反药味数目以及临床理论均混乱不一,迄今仍未能解决。《中华人民共和国药典·1963年版一部》“畏、恶、反者系指一般情况不宜同用”,但仍然众说纷纭,临床处方、药房调配、中医教学甚至涉及医事诉讼等都会遇到困难,是一个亟待解决的课题。近年来,我国各地学者先后对乌头反半夏做了大量研究报告,尚未见阳性结 “Contrary” is one of the seven-emotional theory of the “Shen Nong’s Materia Medica”. It has been circulating for more than 1,800 years, and it is commonly known as “Eighteen Opposition”. However, the number of contradictory drug odors and clinical theories have been mixed in the past and have not been solved so far. “The People’s Republic of China Pharmacopoeia 1963 Edition,” “fear, evil, and counter-measures mean that the general situation is not suitable for use”, but there are still many opinions, clinical prescriptions, pharmacy deployment, Chinese medicine teaching and even involved in medical litigation will encounter difficulties. A topic to be solved urgently. In recent years, scholars from various parts of China have conducted a large number of research reports on anti-Betsia in Aconitum. No positive knot has been seen.