Cocaine is manufactured from the coca plant, which grows naturally in Peru and Bolivia. For centuries, the Peruvian Indians chewed coca leaves to lessen fatigue caused by high altitude living. In 1859, a technique was discovered to extract cocaine hydrochloride from the coca leaves, which was used as an effective local anaesthetic. Cocaine hydrochloride was also used in many commercial products and was an ingredient in Coca-Cola until 1903. In the 1920s, cocaine was banned in most Western countries, except for medical use.