Corydalis's therapeutic uses
Corydalis is a natural plant product traditionally used in Chinese herbal medicine, primarily known for its pain-relieving properties. It is believed to alleviate various types of pain, including those from peripheral neuropathy, painful menstruation, and soft tissue injuries. Beyond its analgesic effects, corydalis is also explored for its potential benefits in managing conditions such as cataracts, heart arrhythmias, and high blood pressure, as well as for its sedative and anti-inflammatory properties. The rhizome of the plant is the part used medicinally, containing bioactive alkaloids like tetrahydropalmatine (THP), which may be responsible for its therapeutic effects.
Despite some promising evidence from animal studies and early human trials, substantial clinical validation is still lacking. Concerns regarding safety have been raised, particularly related to THP, which has been associated with severe liver injury and other significant side effects, leading experts to caution against its use in vulnerable populations, including young children and pregnant women. As research continues into corydalis's medicinal applications, it remains essential to approach its use with caution and awareness of potential risks.
Corydalis's therapeutic uses
DEFINITION: Natural plant product used to treat specific health conditions.
PRINCIPAL PROPOSED USE: Pain relief (including peripheral neuropathy, painful menstruation, and pain caused by soft tissue injuries)
OTHER PROPOSED USES: Cataracts, heart arrhythmia, preventing blood clots, mental health, sedative, digestive issues, high blood pressure, inflammation
Overview
Widely used in Chinese herbal medicine, the herb corydalis has been said to alleviate pain by moving qi (energy) and stimulating the blood. These expressions refer to traditional concepts included within the complex theories of traditional Chinese herbal medicine. Regarding Western diagnostic categories, corydalis may be recommended for soft tissue injuries, menstrual discomfort, abdominal pain, sedation, and several other wide-ranging health issues. The part of the plant used medicinally is the rhizome (underground stalk). Corydalis contains bioactive alkaloids, which are responsible for its health benefits.
![Corydalis aurea. By JerryFriedman (Own work) [CC-BY-SA-3.0 (creativecommons.org/licenses/by-sa/3.0) or GFDL (www.gnu.org/copyleft/fdl.html)], via Wikimedia Commons 94415727-90280.jpg](https://imageserver.ebscohost.com/img/embimages/ers/sp/embedded/94415727-90280.jpg?ephost1=dGJyMNHX8kSepq84xNvgOLCmsE2epq5Srqa4SK6WxWXS)
![Corydalis scouleri. By Walter Siegmund (Own work) [GFDL (www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0-2.5-2.0-1.0 (creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons 94415727-90279.jpg](https://imageserver.ebscohost.com/img/embimages/ers/sp/embedded/94415727-90279.jpg?ephost1=dGJyMNHX8kSepq84xNvgOLCmsE2epq5Srqa4SK6WxWXS)
Therapeutic Dosages
Corydalis is usually taken at a dose of 5 to 10 grams daily or equivalent quantities of an extract.
Therapeutic Uses
There has been some evidence suggesting that corydalis or its constituents offer medicinal benefits. Corydalis contains a number of active and potentially dangerous chemicals in the alkaloid family, including tetrahydropalmatine (THP), tetrahydropapaverine, corydaline, protopine, tetrahydrocoptisine, tetrahydrocolumbamine, and corybulbine. Of these, THP may be the most active, as well as the most toxic.
Only double-blind, placebo-controlled studies can actually show that a treatment works, and these studies began to emerge in the twenty-first century relevant to corydalis. One trial tested THP as a treatment for a type of heart rhythm abnormality called supraventricular arrhythmia. Reportedly, the use of THP produced significant benefits compared with a placebo. However, this study was conducted in China, and there is considerable skepticism about the validity of Chinese medical trials. A study conducted in the early 2020s determined that corydalis may have analgesic properties, but more research on humans was needed.
Animal and test-tube studies have also hinted that THP or corydalis extracts might have pain-relieving, sedative, and anti-inflammatory effects. Corydalis constituents may also affect neurotransmitters in the brain, including dopamine and gamma-aminobutyric acid (GABA). Equally weak evidence hints at benefits for preventing or treating cataracts, reducing blood coagulation, and lowering blood pressure. However, none of this research remotely approaches the level of evidence that can prove a treatment effective. In the twenty-first century, researchers continued to look into the health benefits of corydalis, including possible positive effects on mental health, nerve damage, tremors, and constipation. Corydalis was also being investigated for its role in lowering blood pressure, preventing infections, and its anti-inflammatory properties. Considerations were also made regarding whether it could be used to relieve mild depression and anxiety and manage digestive issues.
Safety Issues
Traditionally, corydalis had not undergone significant safety testing; however, that was changing as more clinical studies were undertaken. The herb is known to produce immediate side effects, including nausea and fatigue, in some people. In addition, serious safety concerns related to its alkaloid constituent THP exist. The use of products containing THP has repeatedly been associated with severe and potentially fatal liver injury. In addition, there have been reports that the use of THP by young children has led to life-threatening suppression of the central nervous system. For these reasons, experts strongly recommend against the use of corydalis, especially by young children, pregnant or nursing women, and people with liver disease.
Bibliography
Alhassen, Lamees, et al. "The Analgesic Properties of Corydalis Yanhusuo." Molecules, vol. 26, no. 24, 2021, doi:10.3390/molecules26247498. Accessed 20 Sept. 2024.
Clark, Alena. "Corydalis: Uses, Side Effects, and More." Verywell Health, 6 Sept. 2024, www.verywellhealth.com/corydalis-benefits-4589168. Accessed 17 Sept. 2024.
"Corydalis—Health Information Library." PeaceHealth, 24 Mar. 2015, www.peacehealth.org/medical-topics/id/hn-2074006. Accessed 17 Sept. 2024.
McRae, C. A., et al. "Hepatitis Associated with Chinese Herbs." European Journal of Gastroenterology and Hepatology, vol. 14, 2002, pp. 559–62.
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Stickel, F., G. Egerer, and H. K. Seitz. "Hepatotoxicity of Botanicals." Public Health Nutrition, vol. 3, 2000, pp. 113–24.