Yuan Hu Corydalis Root Classic Formulas … Natural Herb Library

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Invigorates Blood, moves qi, and relieves pain ... Yuan Hu remains a practical raw corydalis dispensing lane for painful stagnation affecting the chest, flanks, abdomen, and menses.
Treats distending and fixed pain ... it is valued when obstruction is obvious and both blood stasis and qi stagnation need to be moved together.
Extends to traumatic injury and postpartum pain ... this short-name alias still belongs to the same traditional pain-medicine stream as other raw yanhusuo records.

Jin Ling Zi San ... constrained-pain pairing in which corydalis helps resolve stagnation and pain.
Yan Hu Suo Zhi Tong Wan ... familiar formula lineage centered on corydalis for stagnation pain.
Shao Fu Zhu Yu Tang modifications and trauma pairings ... practical contexts where corydalis supports movement and analgesia.

Classical and modern materia medica continue to treat Yuan Hu as part of the broader yanhusuo pain-herb complex rather than as a separate medicinal species.
Its importance lies in the unusual combination of moving both qi and blood in one herb.