It existed in 1900, but a cured patient is a lost client and therefore had to be banned.

“Until 1833, Cannabis Sativa was the largest agricultural crop in the world, and it was possible to obtain countless different products from this plant because the hemp plant has the most resilient natural fiber in the world.”

You can buy fabrics, oils, medicines and paper from it.
Until 1900, most textiles were hemp, and about 50% of drugs on sale, for almost the entire second half of the 19th century. Over 25,000 cellulose products (from dynamite to cellophane).

But as early as 1900 in the United States, surprising newspapers started to appear in the dangers of this damn plant that drove black people crazy and made them play "the devil's music"

Cannabis or hemp had been banned in all its forms. It couldn’t compete with the emerging cotton, processed food and oil industries

https://en.wikipedia.org/wiki/Legal_history_of_cannabis_in_the_United_States