Knoxia Root … Classic Formulas
Hong Da Ji · Radix Knoxiae
Primary Actions
- Resolves toxicity, reduces swelling, and dissipates nodules - Hong Da Ji is used for scrofula, sores, boils, abscesses, and hard toxic swellings.
- Drives out retained water and relieves fluid accumulation - traditional indications include thoracic or abdominal effusion, edema, and difficult urination or defecation when accumulation is severe.
- Breaks up stubborn masses - it is selected when swelling is hard, fixed, and obstructive rather than mild and diffuse.
Classic Formulas
- Zi Jin Ding / Yu Shu Dan - classical detoxifying emergency pill tradition in which Hong Da Ji helps attack toxic accumulations and hard swelling.
- Hong Da Ji with Qian Jin Zi Shuang and Wu Bei Zi - a classical harsh-toxin strategy for severe swelling, phlegm-turbidity, and foul accumulations.
- Hong Da Ji with Ban Bian Lian or Xia Ku Cao - pairing logic for scrofula, nodules, and stubborn toxic swellings.
Classical Text References
- Modern TCM references describe Hong Da Ji as bitter, cold, and slightly toxic, entering the Lung, Spleen, and Kidney to counter toxin, drive out accumulated water, reduce swelling, and dissipate nodules.
- The Chinese pharmacopoeial separation of Hong Da Ji from Jing Da Ji is clinically important and should not be blurred during sourcing or interpretation.
- This page follows the Rubiaceae Knoxia identity rather than treating Hong Da Ji as a mere variant of Euphorbia Da Ji.