Cocaine

Cocaine, an alkaloid from coca leaves, was used for its pain-relieving properties and tested as a local anesthetic during an eye surgery. This led to developments in safer and more effective local anesthetics.
 Karl Koller Austria 1884 Cocaine

Cocaine, an alkaloid from coca leaves, was used for its pain-relieving properties and tested as a local anesthetic during an eye surgery. This led to developments in safer and more effective local anesthetics.