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Corydalis is a plant. People use the tuber and root for medicine.
Corydalis is used for mild depression, mild mental disorders, emotional disturbances, severe nerve damage, and limb tremors. It is also used as a mild sedative and tranquilizer, as a hallucinogen, to lower blood pressure, and to relax spasms in the small intestine.
There isn't enough information to know how corydalis might work.