Chelidonium majus, commonly known as greater celandine or tetterwort, , nipplewort, or swallowwort, is a herbaceous perennial plant, the only species in the genus Chelidonium. It is native to Europe and western Asia and introduced widely in North America.
While the greater celandine belongs to the poppy family, the lesser celandine belongs to the buttercup family.
The whole plant is toxic in moderate doses as it contains a range of isoquinoline alkaloids but there are numerous therapeutic uses when used at the correct dosage.The main alkaloid present in the herb and root is coptisine.
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