Bing Lang (槟榔) — Betel Nut: TCM Uses, Tapeworm Treatment & Formulas

At a Glance

Herb: Bing Lang
Chinese name: 槟榔 (Bīng Láng)
Latin name: Areca catechu L.
Nature: Warm
Taste: Acrid / Bitter
Meridian: Stomach / Large Intestine
Category: Herbs that Expel Parasites
Introduction: Bing Lang (槟榔), the dried mature seed of Areca catechu L. (betel palm), is the most important antiparasitic herb in the Chinese materia medica and has been used since the Tang dynasty for expelling intestinal parasites. Recorded in the Ming Yi Bie Lu, it is especially effective against tapeworms (绦虫) when used in large doses alongside Nan Gua Zi (pumpkin seed). Beyond antiparasitic use, its alkaloids — primarily arecoline — also move qi, drain downward, and promote urination. Modern pharmacology confirms arecoline’s antiparasitic, gastrointestinal motility-enhancing, and cholinergic activities; habitual betel nut chewing is linked to oral cancer risk.

Kills and expels intestinal parasites — effective against tapeworm, roundworm, pinworm, and liver fluke
Moves qi and drains stagnation — promotes bowel movement, relieves abdominal distension
Promotes urination and reduces edema — treats damp-heat edema and water accumulation
Descends qi and treats malaria — historically used in malaria prevention formulas

Standard dose: 6–15 g for general use; 60–120 g for tapeworm expulsion
Use with caution in qi deficiency — its strongly descending nature depletes qi
Contraindicated in cases with prolapse of the rectum or uterus
Avoid in pregnancy — may stimulate uterine contractions
Habitual chewing of raw betel nut (not the medicinal preparation) is associated with oral cancer — distinguish from therapeutic use
Large doses may cause nausea, vomiting, and excessive salivation from arecoline

Hua Chong Wan (化虫丸): Bing Lang, He Shi, Wu Yi, Ku Lian Pi — broad-spectrum antiparasitic formula
Nan Gua Zi + Bing Lang protocol: Nan Gua Zi 60–120 g (raw, crushed) taken first on empty stomach, followed 2 hours later by Bing Lang 60–120 g decoction, then castor oil — the classical two-stage tapeworm expulsion method
Ji Chuan Jian (济川煎) variant: Bing Lang added for bowel motility in constipation
Da Fu Pi (大腹皮) is the outer husk of Bing Lang — used separately for qi stagnation and edema

For tapeworm infestation: combine with Nan Gua Zi (pumpkin seeds) — Nan Gua Zi first, then Bing Lang decoction to expel.
For roundworm and pinworm: combine with Ku Lian Pi, Shi Jun Zi.
For food stagnation with abdominal pain and constipation: combine with Mu Xiang, Qing Pi, Da Huang (Mu Xiang Bing Lang Wan).
For damp-heat dysentery with tenesmus: combine with Mu Xiang, Huang Lian, Bai Shao.
For malaria: combine with Qing Hao, Chai Hu, Huang Qin.
For edema from water retention: combine with Ze Xie, Fu Ling, Mu Tong.
For foot qi (beriberi) with leg swelling: combine with Wu Zhu Yu, Mu Gua, Chen Pi.

Anthelmintic
- arecoline paralyzes tapeworms via muscarinic receptor stimulation
Prokinetic
- increases GI motility through muscarinic agonism
Antiprotozoal
- active against Giardia, Entamoeba, and malarial parasites
Cholinergic
- stimulates smooth muscle, increases salivation and GI secretions
tannins
- Antifungal: inhibit Candida and Aspergillus growth
Diuretic
- promotes urine output, reduces edema
SAFETY
- carcinogenic with chronic high-dose use — restrict to short-term clinical dosing

Ming Yi Bie Lu (《名医别录》): ‘Governs dissolving grain and expelling water, eliminates phlegm accumulation, kills the three parasites and lurking corpse, and treats tapeworm.’
Ben Cao Gang Mu (《本草纲目》): ‘Treats diarrhea and dysentery with tenesmus, all Heart and abdominal pain, qi obstruction of urination and defecation, phlegm-qi wheezing and urgency, treats all malaria, and wards off miasmatic pestilence.’
Ben Cao Jing Shu (《本草经疏》): ‘Areca Seed: bitter to break stagnation, acrid to scatter pathogen; specializes in breaking stagnant qi downward — hence it is a miraculous medicinal for treating tenesmus, and also a digestive herb.’
Ben Cao Zheng Yi (《本草正义》): ‘Areca Seed can descend qi and also kills parasites, breaks hard accumulation, dissolves food and promotes water — a key herb for dissolving stagnation and treating malaria.’