Top 10 Health Benefits of Marijuana In 2737 BC It has been described that during that period, the first direct reference was found in China in the writings of the Chinese Emperor Shen Nung. The first use of cannabis product was used for psychoactive agents. In the writings, the focus was mainly on its power as a medication for rheumatism, gout, malaria, and funny enough, for absent-mindedness. The importance of medicinal value was focused mainly than the intoxication properties. Gradually its use spread