I am not aware of any medicinal use or definition associated with 'Caragana', which is typically referenced as a genus of shrubs and trees in the legume family (Fabaceae). Caragana species are often used in landscaping due to their hardiness and attractive flowers. If you have more context or specific information related to Caragana being used in a medicinal sense, please provide it so I can give a more informed response.

I'm sorry for any confusion, but "Caragana" is not a medical term. It is the name of a genus of shrubs in the pea family (Fabaceae). These plants are also known as Siberian peashrubs and are native to Asia. They are often used in landscaping due to their hardiness and ability to tolerate drought and poor soil conditions. If you have any questions about a medical condition or term, I would be happy to try to help with those!