Pungent, bitter, warm and slightly toxic
1. To open the nasal cavities; 2. To dispel wind and dampness; 3.To stop pain
1. Rhinorrhea manifested as headache, nasal obstruction, runny nose and loss of smell. Xanthium fruit (Cang Er Zi ) is used with Magnolia flower (Xinyi) and Dahurian angelica root (Bai Zhi ) in the formula Canger San.2.Wind-damp bi syndrome manifested as joint pain and spasms of the limbs. Xanthium fruit (Cangerzi) is used with clematis root (Wei Ling Xian ), Cinnamon bark (Rou Gui ), Atractylodes rhizome (Cang Zhu ) ahd Chuan Xiong  rhizome (Chuanxiong).
This herb is contraindicated in herd-ache due to blood deficiency. Overdosing will produce toxins and give rise to vomiting, abdominal pain and Diarrhea .