Valerian is an herb. It is native to Europe and parts of Asia but also grows in North America. Medicine is made from the root.
Valerian is most commonly used for sleep disorders, especially the inability to sleep (insomnia). Valerian is also used orally for anxiety and psychological stress, but there is limited scientific research to support these uses.
In manufacturing, the extracts and oil made from valerian are used as flavoring in foods and beverages.