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Corydalis Tuber

Corydalis Tuber-Original stateCorydalis Tuber-Medicinal materialCorydalis Tuber-Pieces
Corydalis Tuber-Original stateCorydalis Tuber-Medicinal materialCorydalis Tuber-Pieces

        
        Latin:
        Rhizoma Corydalis
         
        Origin:
        Corydalis tuber is the rhizome of the perennial plant Corydalis yanhusuo W. T. Wang, of the family Papaveraceae. Corydalis is a genus of about 300 species of plants native to north temperate areas and southern Africa. Most are weak-stemmed perennial garden plants with underground tubers and lobed or finely dissected leaves.
       Corydalis yanhusuo is grown in China. The flowers are hermaphrodite (have both male and female organs). The plant can grow in semi-shade (light woodland) or no shade. It requires moist soil.
       In China, this species is mainly produced in the provinces Zhejiang, Jiangsu, Hubei, Hunan, etc. Harvested when the stem leaves wither at the beginning of summer, fibrous roots are removed from the rhizome, then boiled in water until its white core just vanishes, taken out, dried in the sun and cut into thick slices or mashed for use when raw or after frying with vinegar.
         
        Properties:
        Pungent and bitter in flavor, warm in nature, it is related to the liver, spleen and heart channels.
         
        Functions:
        Promotes blood circulation, activates the flow of qi and kills pain.
       Corydalis tuber is an important Chinese herb that has been used for hundreds of years to help 'invigorate the blood' and relieve almost any painful condition. It is used especially to relieve menstrual cramps, chest and abdominal pains. The plant contains powerful alkaloids that are responsible for this effect.
         
        Applications:
        1. Treats various types of pains due to stagnation and stasis of qi and blood:
       Dispersing with its pungent taste and clearing with its warm nature, this herb "can reactivate the flow of qi stagnated in the blood and the flow of blood stagnated in qi, so it is specialized in the treatment of various types of pains all over the body". As it has an excellent analgesic effect, it can be used in combination with other herbs for any type of pain.
       a) Epigastric pain due to obstruction of qi in the chest:
       Corydalis tuber is used in combination with Mongolian snakegourd (Fructus Trichosanthis), onion bulb (Bulbus Allii Macrostemi) or red-rooted salvia root (Radix Salviae Miltiorrhizae), chuanxiong (Rhizoma Ligustici Chuanxiong), etc.
       b) Stomach ache:
       Corydalis tuber is used in combination with largehead atractylodes rhizome (Rhizoma Atractylodis Macrocephalae), immature citron or trifoliate orange (Fructus Aurantii Immaturus), herbaceous peony root (Radix Paeoniae Alba), etc.
       c) Pain of the cold type:
       Corydalis tuber is used in combination with cassia twig or lesser galangal (Rhizoma Alpiniae Officinarum).
       d) Pain of the heat type:
       It is used in combination with pittosporum root (Radix Pittospori) and chinaberry (Fructus Meliae Toosendan).
       e) Pain due to stagnation of qi:
       Corydalis tuber is used in combination with nutgrass flatsedge rhizome (Rhizoma Cyperi) and aucklandia root.
       f) Pain due to blood stasis:
       It is used in combination with red-rooted salvia root (Radix Salviae Miltiorrhizae) and complex-toothed flying squirrel feces.
       g) Distending pain in the hypochondriac region due to stagnation of liver-qi:
       Corydalis tuber is used in combination with Chinese thorowax root (Radix Bupleuri), aromatic turmeric root-tuber (Radix Curcumae), etc.
       h) Dysmenorrhea (painful menstruation) and postpartum abdominal pain due to blood stasis and qi stagnation:
       It is used in combination with Chinese angelica, safflower, nutgrass flatsedge rhizome (Rhizoma Cyperi), etc.
       i) Abdominal pain due to cold hernia:
       Corydalis tuber is used in combination with common fennel, evodia fruit, etc.
       j) Traumatic injuries:
       It is used in combination with olibanum and myrrh.
       k) Arthralgia due to pathogenic wind-cold:
       Corydalis tuber is used in combination with largeleaf gentian root (Radix Gentianae Macrophyllae), cassia twig, etc.
       l) A variety of spastic and non-spastic pains of internal organs:
       In modern times, corydalis tuber has been used for the clinical treatment of a variety of spastic and non-spastic pains of the internal organs, resulting in quite good curative effects.
         
        Dosage and Administration:
        5-10 g., decoction.
       1.5-3 g., grind into powder for oral administration.
       It is mostly prepared with vinegar, which can greatly increase the solubility of its effective ingredients and enhance its analgesic effect.
         
        Cautions on Use:
        Although no specific mention has been seen for this species, there is a report that corydalis species are potentially toxic in moderate doses.
         
        Reference Materials:
        Lei's Treatise on Preparation of Herbs : "Serious epigastric pain."
       Kai Bao Materia Medica : "Resolving blood stasis. It is ground with wine or decocted for oral administration."
       "Various types of postpartum diseases due to blood troubles, irregular menstruation, masses in the abdomen, metrorrhagia and lochiorrhea, postpartum swoon due to excessive loss of blood during child delivery, sudden blood uprush and metrorrhagia (profuse uterine bleeding especially between menstrual periods) due to an injury."
       The Compendium of Materia Medica : "Corydalis tuber can reactivate qi stagnated in the blood and blood stagnated in qi, so it is specialized in the treatment of various types of pains all over the body."
         
        Toxic or Side Effects:
         
        Modern Researches:
        A variety of alkaloids are separated out from the rhizome of corydalis tuber, such as d-corydaline (corydalis A), protopine (corydalis C), dl-tetrahydropalmatine (corydalis B), d-glaucine, coptisine, dehydrocorydaline, corydalis G, etc.
       Corydalis tuber has an analgesic effect with its valence being one-tenth of that of opium: Corydalis B and corydalis G are the most powerful, followed by corydalis A; corydalis C also has an obvious analgesic effect. Corydalis B has marked tranquilizing, hypnotic and calming effects. In addition, it also has mild central antiemetic and temperature-reducing effects.
       Various extracts from the plant have shown antitussive (cough suppressant), cardiotonic, hypotensive and anticancer activity.