There is a story about “Guan Yunchang gets his bone scrapped to get rid of poison” in the 75th chapter of “The Romance of the Three Kingdoms”. Inspired from the phenomenon that people get drunk, the great doctor Hua Tuo invented the whole body anesthetic “anesthesia powder” with mandragora as the main ingredient. Mandragora is also known as Datura metel and has efficacies like relieving asthma, rheumatic pains, anesthetizing and pain killing, etc. It is used to treat asthma, epilepsy, rheumatism, dermatophytosis, swelling and ulcer paining, etc.
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