Corydalis yanhusuo is found in China. C. gariana, is native to the Himalayas. Corydalis cava, is used in European herbalism. Corydalis canadensis is found in North America.

May be made into a tea, tincture, or a decoction. In traditional Chinese medicine corydalis is usually mixed with other herbs.

Some reports indicate that corydalis is incompatible with tannic acid and vegetable astringents. Used in traditional Chinese medicine positively. Needs studies for interactions with Western drugs.

Overdose: likely to produce shaking and tremors. No poisonings reported.

Analgesic, blood circulation tonic, sedative, lowers blood pressure, diuretic.