This document applies to non-pharmacopoeial reference standards for herbal substances, herbal preparations and herbal medicinal products/traditional herbal medicinal products. The proposed guideline aims to identify the criteria to be taken into account when using such reference standards.
Keywords: Herbal medicinal products, traditional herbal medicinal products, herbal substances, herbal preparations, reference standards, primary standards, secondary standards, active markers, analytical markers, non-pharmacopoeial reference standards