" Where a placebo merely is wanted, the purpose may be answered by means, which, although perhaps reduced under the materia medica, do not, however, deserve the name of medicines, " physician Andrew Duncan wrote in his 1770 book Elements of Therapeutic.
安德鲁·邓肯医生在他 1770 年出版的《治疗元素》一书中写道:“如果仅仅需要安慰剂,目的可以通过某种方式来实现,尽管这种方式在本草医学中可能有所减少,但却不配被称为药物。”