Anesthesia for Surgery
A surgeon in China named Hua Tuo, who practiced somewhere between 140-208 CE, is the first person to have recorded cannabis’s use as anesthesia for surgery.
To make this concoction, he would grind down the cannabis plant and then mix the powder with wine.
In fact, the word mázui 麻醉, or anesthesia, borrows an element from the character combination for cannabis, máfén 麻蕡 or mábó 麻勃, thus establishing a kind of link between the use of cannabis and anesthesia.
Other reported uses for cannabis in ancient China include everything from constipation relief to battling hair loss to dealing with blood clots and even as a cure for tapeworms!