Notopterygium root, also known as Qiang Huo, comes with a long history of medicinal application. First found in the âShen Nongâs Herbal Classicâ, notopterygium was listed under the item Angelica Root (Du Huo). Thatâs to say, these two Chinese herbs were considered to be the same thing then. And this belief didnât change until the Yao Xing Ben Cao (Materia Medica of Medicinal Properties) was published in Tang Dynasty. Medicinally this root herb is one of the main raw materials for the manufacture of Chinese Traditional Patent Medicine for joint pain relief and rheumatoid arthritis treatment.