This product is the underground bulb of the perennial herbaceous plant Allium macrostemon Bge. and A. chinense G. Don, belonging to the Lily Bulb family. It is distributed throughout the country, mainly produced in Jiangsu, Zhejiang, and other regions. It is harvested in summer and autumn, washed, the fibrous roots removed, steamed or scalded in boiling water, and then dried in the sun. It is used in its raw form.

bubble_chart Properties and Meridians

Acrid and bitter, warm. Act on lung, stomach and large intestine meridians.

bubble_chart Efficacy

Dispersing yang stagnation, moving qi, and removing food stagnation.

bubble_chart Indications

1. Used for chest impediment syndrome. This product is pungent and dispersing, bitter and descending, warm and unblocking, and slippery, good at dispersing the stagnation of pudendal coldness, and moving the obstruction of chest yang, making it an essential medicine for treating chest impediment. For chest impediment syndrome caused by cold phlegm obstruction and chest yang deficiency, it is often combined with Trichosanthis Fruit, Pineilia, Immature Orange Fruit, and other medicinal combinations, such as Trichosanthis Fruit Longstamen Onion Bulb White Wine Decoction, Trichosanthis Fruit Longstamen Onion Bulb Pineilia Decoction, Immature Orange Fruit, Longstamen Onion Bulb, and Cinnamon Twig Decoction, etc. For phlegm-stasis chest impediment, it can be combined with Salvia, Sichuan Lovage Rhizome, Trichosanthis Fruit peel, etc.
2. Used for stuffiness and fullness distending pain in the epigastrium and abdomen, and tenesmus in diarrhea. This product has the functions of moving qi and removing food stagnation, relieving distension, and stopping pain. For gastrointestinal qi stagnation and tenesmus in diarrhea, it is often combined with Aucklandia Root and Immature Orange Fruit. For stuffiness and fullness distending pain in the epigastrium and abdomen due to stomach cold qi stagnation, it can be combined with Lesser Galangal Rhizome, Villous Amomum Fruit, Aucklandia Root, etc.

bubble_chart Documentation

1. Bielu: "Warming the middle, dispersing stagnant qi."
2. Bencao Gangmu: "Treats shaoyin disease, reversal cold of limbs, diarrhea, chest impediment stabbing pain, lowering qi, and dispersing blood."

bubble_chart Usage and Dosage

Decoct and take 5-10g.

bubble_chart Modern Pharmacology

This product contains garlic acid, methyl garlic acid, garlic sugar, etc. Longstamen Onion Bulb can promote fibrin dissolution, reduce stirred pulse lipid patches, blood lipids, serum lipid peroxides, inhibit platelet aggregation and release reactions, and inhibit stirred pulse smooth muscle cell proliferation.