The bark of the tree (Cinchona officinalis) quinine is extracted from
Quinine is an alkaloid which can reduce fever, work against malaria, pain and swelling. The bark of the Cinchona family of trees contains quinine. Quinine can be made artificially, but this is more expensive than extracting it from the bark of the tree. This tree is found in the Andes, South America, Indonesia, and Congo.