[[File:Dichroa Febrifuga.jpg|thumb|Alt=|350px|left|Dichroa Febrifuga]]
Other Names : Dichroa Root, Dichroa Febrifuga, Chinese Quinine<br>
Chang shan is a root extract of a specific type of Himalayan hydrangea plant, also known as [[related to Hortensia]].
==Special Precautions of Chang Shan==
* Because dichroa is slightly toxic, large doses may cause nausea and vomiting in patients with weak constitutions. It should be used with extreme caution, and should not be taken by women who are pregnant or breastfeeding.