 Substances known to be potentially dangerous include "Aconitum", secretions from the Asiatic toad, powdered centipede, the Chinese beetle ("Mylabris phalerata"), certain fungi, "Aristolochia", Arsenic sulfide (Realgar), mercury sulfide, and cinnabar.Asbestos ore (Actinolite, Yang Qi Shi, 阳起石) is used to treat impotence in TCM.Due to galena's (litharge, lead(II) oxide) high lead content, it is known to be toxic.