Eden Apothecary · Herb Profile
Pinellia ternata
Also known as Ban Xia
Pronounced Pinellia = pih-NEL-ee-uh; Pinellia ternata = pih-NEL-ee-uh ter-NAH-tuh; Ban Xia = bahn shyah
Warm, dry, and acrid: the chief phlegm-transforming, damp-drying herb that descends rebellious stomach qi to quiet nausea and dissolve cold, boggy phlegm, potent, and safe only when properly processed.
On temperature, the old sources disagree: Shennong Bencao Jing (c. 200 CE) reads it as neutral; Bencao Congxin (1757) and Bencao Gangmu (1596) read it as warm. The app keeps warm, the modern reading of what the herb does in the body; the old readings are shown here but do not change it. Li Shizhen, in Bencao Gangmu, also says it is a mistake to call pinellia drying in nature; Bencao Congxin calls it drying and then quotes that same objection.
Avoid. Classical Chinese practice forbade Ban Xia in pregnancy, and animal data raise concern: Pinellia disturbed the metabolomic profiles of the placenta and amniotic fluid in pregnant rats, and Chinese herbal extracts including Pinellia have shown embryotoxicity in the embryonic stem cell test. The online AHPA Botanical Safety Handbook, 2nd ed. assigns Pinellia ternata Safety Class 2d (specific-use restrictions), amended from Class 3 in AHPA's December 2022 online update (AHPA, "AHPA updates 14 entries to the online Botanical Safety Handbook, 2nd ed. in final 2022 release", https://www.ahpa.org/blog_home.asp?display=163), and the warm, drying rhizome carries a theoretical uterine and fluid-drying concern. In classical practice a small, expert-supervised dose of ginger-processed Ban Xia (Jiang Ban Xia) appears in morning-sickness formulas, but human safety data are contradictory, so the default for self-use is avoidance. Source: AHPA online Botanical Safety Handbook, 2nd ed. (December 2022 online update); pregnant-rat placenta and amniotic-fluid metabolomic study (PubMed 26923539); WebMD/RxList Pinellia ternata.
Insufficient data; avoid pending evidence. There are no reliable human lactation studies, and the warm, drying, fluid-reducing nature raises a theoretical concern for milk supply. WebMD and RxList advise avoidance during breastfeeding for lack of data. Reserve any use for qualified practitioner guidance. Source: WebMD/RxList Pinellia ternata; AHPA Botanical Safety Handbook, 2nd ed.
Not for casual pediatric use. No pediatric dosing or safety data exist, and the raw tuber's acrid raphides pose a real risk of oral, pharyngeal, and airway swelling in a child. Any use should be a properly processed form given under qualified practitioner supervision, and raw material must be kept away from children. Source: AHPA Botanical Safety Handbook, 2nd ed.; processing/detoxification review (PubMed 36087845).
A practitioner-administered herb, not for casual self-dosing. Use only properly processed forms internally: the raw tuber contains needle-like calcium oxalate raphides and toxic lectins that cause intense burning and swelling of the mouth, tongue, and throat (with a risk of airway edema), gastrointestinal irritation, and, in animal studies, cardiotoxicity. Even processed, it is warming and drying, so it is contraindicated in Yin deficiency, dry cough, heat-phlegm, and bleeding. Do not combine with aconite (Fu Zi, Chuan Wu, Cao Wu). Avoid in pregnancy. Overdose or raw ingestion is a medical emergency.
The raw, unprocessed tuber is absolutely contraindicated for internal use (toxic). Contraindicated in pregnancy (embryotoxic in animal studies and classically forbidden) and in Yin-deficient dry cough, heat-phlegm, fire, and active bleeding. Avoid while breastfeeding and in young children for lack of safety data and the raw-tuber airway risk. Do not co-administer with aconite-containing herbs or formulas. Not a substitute for medical evaluation of a persistent cough, hemoptysis, a throat lump, or intractable vomiting.
Pinellia ternata is a major cultivated medicinal crop across China (Gansu, Guizhou, Sichuan, Hubei, and elsewhere), so demand is met largely from cultivation rather than wild harvest, though intense demand has locally depleted wild stands. It is not on the United Plant Savers (North American) at-risk list. In North America it can behave as an aggressive garden weed, so cultivation should be contained. Source only correctly processed (Jiang, Fa, or Qing Ban Xia) material from reputable GMP suppliers, because proper processing is what makes the herb safe.
Not named in the canonical biblical texts and unknown to the classical Mediterranean writers (Dioscorides, Pliny): Pinellia ternata is native to East Asia. Its documented tradition is Chinese, first recorded in the Shennong Ben Cao Jing (c. 200 CE) and carried without interruption through two thousand years of Chinese materia medica.
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