Cocaine is a highly addictive and a naturally occurring anesthetic, or pain blocker.
It is extracted from the leaves of Erythroxylon coca (E. coca), also known asTrusted Source the coca scrub, a plant that grows in the Andean highlands of South America.
It is the most powerful stimulant of natural origin. When Coca-Cola was first produced, it contained 9 milligrams of cocaine per glass. In 1903, this ingredient was removed, but the drink still has coca flavoring.
In 1884Trusted Source, Karl Koller, an Austrian ophthalmologist, first used cocaine as an anesthetic during eye surgery. It was a popular and widely used anesthetic until the early 20th century.
As the medical profession came to realize that cocaine was addictive, safer anesthetics were developed. Cocaine, in its basic form, is no longer routinely used.