TCM Properties

Traditional Use

Warms the middle and stops vomiting - Wu Yu is used for nausea, retching, cold-type epigastric pain, and rebellious Stomach qi when cold is the core problem.
Disperses Liver cold and alleviates pain - it is a classic herb for vertex headache, hernial pain, cold abdominal pain, and menstrual pain rooted in cold stagnation.
Directs rebellious qi downward - formulas use it for acid regurgitation, sour swallowing, and cold-constrained Liver-Stomach disharmony.
Warms the Spleen and Kidney and stops dawn diarrhea - it appears when deficiency cold causes early-morning loose stool with cramping and exhaustion.

This record keeps the shorter import alias Wu Yu, but the standard pharmacopoeial herb identity is Wu Zhu Yu, the well-known hot fruit of Tetradium ruticarpum and related species.
Because it is strongly warming and drying, successful use depends heavily on correct cold-pattern identification rather than casual use for any nausea or headache.

Wu Zhu Yu Tang - classic formula for cold-deficiency headache, vomiting, and epigastric discomfort with rebellious qi.
Zuo Jin Wan - famous Liver-Stomach formula pairing Huang Lian with a small dose of Wu Zhu Yu for acid regurgitation and heat-cold complexity.
Si Shen Wan - dawn-diarrhea formula using Wu Zhu Yu to warm the middle and help secure chronic leakage.

Me and Qi describes Wu Zhu Yu as a hot, bitter-pungent herb entering the Liver, Spleen, Stomach, and Kidney to stop vomiting, warm the interior, and relieve cold pain.
Traditional materia medica consistently warns that its powerful hot nature makes it inappropriate for heat patterns, yin deficiency, or reckless self-use.

Evodiamine - one of the best-known quinazolinocarboline alkaloids in Evodia research
Rutaecarpine - major alkaloid discussed in vascular, inflammatory, and gastrointestinal studies
Dehydroevodiamine - a related alkaloid often included in mechanistic research
Limonin and related bitter constituents - broader compounds contributing to fruit chemistry

A 2023 review focused on the major indole alkaloids of Evodia rutaecarpa and their potential relevance to gastrointestinal disease research, reflecting the herb's long traditional digestive focus (PMID 37741256).
A 2011 review summarized anti-inflammatory and anti-infectious effects of Wu Zhu Yu and its major constituents, helping explain modern interest in the herb's bioactive alkaloids (PMID 21320305).
A 2021 study reported that rutaecarpine ameliorated pressure-overload cardiac hypertrophy in an experimental model, illustrating the expanding pharmacology literature beyond classical digestive indications (PMID 33510809).

Wu Zhu Yu is strongly hot and drying, and excessive dosing can aggravate nausea, mouth irritation, or heat symptoms.
Alkaloid-rich extracts and supplements are not equivalent to standard processed decoction slices.
MSK page not found - drug interaction data not available from Memorial Sloan Kettering integrative medicine database