Areca Seed

Traditional Use

Primary Actions

• Kills parasites and expels worms — the most potent antiparasitic herb in the TCM pharmacopoeia; effective against tapeworms (Taenia solium, T. saginata), roundworms (Ascaris), pinworms (Enterobius), and liver flukes (Clonorchis); combined with Nan Gua Zi (pumpkin seeds) for tapeworm, which first immobilises the worm, then Bing Lang expels it
• Moves Qi and reduces food stagnation — abdominal distension, food stagnation, and constipation from Qi stagnation and accumulation; 'breaks Qi' (po qi) action destroys abdominal Qi blockage more forcefully than typical Qi-regulating herbs
• Promotes urination and reduces edema — water retention and edema from Qi stagnation obstructing the Triple Jiao water metabolism; combined with Mu Tong and Ze Xie
• Disperses malarial patterns — classical component of malaria-specific formulas (Jie Nue San / anti-malarial protocols); bitter-warm dispersing action on malarial Shao Yang patterns

Secondary Actions

• Descends Qi and relieves bloating — belching, fullness, and oppression in the chest-epigastric area from stagnant Qi accumulation
• Mildly laxative — bitter-warm purgation at higher doses; used in some constipation formulas

Classic Formulas

• Mu Xiang Bing Lang Wan (木香槟榔丸) — for food stagnation and Qi stagnation with abdominal pain, constipation, and dysentery; Bing Lang combined with Mu Xiang, Da Huang, Qing Pi, Chen Pi, Qian Niu Zi, and Hong Hua; classical combination formula still used for functional constipation and intestinal Qi stagnation
• Hua Chong Wan (化虫丸) — classical antiparasitic formula; Bing Lang combined with Ku Lian Pi (Melia bark), He Shi, Wu Yi, and Lei Wan; used for multiple intestinal parasites including roundworm and tapeworm
• Nan Gua Zi Bing Lang Tang (南瓜子槟榔汤) — two-herb protocol for tapeworm; pumpkin seeds (Nan Gua Zi) taken first to paralise worm, followed by Bing Lang decoction to expel; most widely used clinical tapeworm treatment in TCM before pharmaceutical anthelminthics

Classical References

• Shen Nong Ben Cao Jing: records Bing Lang (槟榔) for 'Gu (parasites), Qi stagnation, and water retention; opens the channels and eliminates Qi accumulation'
• Ben Cao Gang Mu (Li Shizhen): 'Bing Lang (槟榔) — bitter-pungent, warm; Large Intestine and Stomach; kills the 'six parasites', moves downward like an axe through Qi stagnation, reduces food accumulation, disperses water; the most powerful herb against tapeworm (Gan Tao Chong); used throughout south China and southeast Asia as a daily stimulant — this habitual use is medically separate from therapeutic TCM dosing'
• CARCINOGENICITY NOTE: Habitual betel nut chewing (Bing Lang used as a recreational stimulant — raw nut, calcium hydroxide, and often tobacco wrapped in betel leaf) is classified by IARC as a Group 1 carcinogen for oral cavity cancer and oropharyngeal cancer. This carcinogenicity applies specifically to the habitual chewing practice prevalent in Taiwan, Southeast Asia, and South/Central Asia — where 600 million people chew daily. The mechanism is arecoline-induced reactive oxygen species damage and oral submucous fibrosis. TCM therapeutic use in water decoction at standard doses (6–15 g) for short-course parasite treatment or Qi stagnation has fundamentally different pharmacokinetics (no direct mucosal contact, arecoline rapidly hydrolysed in solution) and a substantially different risk profile. Current evidence does not establish the same carcinogenicity risk for occasional therapeutic decoction use; however, long-term therapeutic use should be minimised.