The first evidence indicating the medical usage of cannabis dated back 5000 years ago to China during the reign of Emperor Chen Nung (Grinspoon 1). Since then, cannabis is used as herbal medicine in India, the Middle East, Southeast Asia, South Africa, and South America. One reason cannabis is used today is to alleviate pain from childbirth in countries such as Africa. Cannabis was not popularized for its medicinal purposes until the mid-19th century. Contemporary physicians were less educated about cannabis because they were not as experimental in exploring the therapeutic potential of cannabis.
The first Western physician to actually begin exploring the benefits of cannabis was WB O’Shaughnessy, a professor from the Medical College of Calcutta, whom was able to firsthand observe cannabis use in India. His studies even led the court physician to give cannabis as medication to Queen Victoria.
Use of cannabis started to decline after potency and consumption caused erratic and unpredictable effects. The first law put in place to stop unsupervised recreational use was the Marijuana Tax Act of 1937 requiring any person using marijuana to pay a tax of $100/ounce. This made it difficult for doctors to study cannabis therapeutics. Cannabis was officially removed from pharmacies in 1941 via the United States Pharmacopeia and National Formulary.
Since then, cannabis in medical society has gradually been creeping back into pharmacology and is currently a big debate. Now, studying cannabis will be more effective and efficient with the use of improved technology and knowledge of past herbal benefits.
Major credits of historical compilations to:
Grinspoon, Lester. "History of Cannabis as Medicine." (2005): 1-31. Web. 01 Feb. 2010.