What is Tetrahydrocannabinol?
[[File:Tetrahydrocannabinol.svg|alt=THC chemical|thumb|The chemical structure of THC]] '''Tetrahydrocannabinol,''' or '''THC,''' is the [[Chemical substance|chemical]] or [[drug]] made in the [[cannabis]] that causes a person to feel different.<ref>Reefer madness-The Federal response to California’s Medical-Marijuana Law.Annas, G.J. ; New Eng J Med, 1997; 337: 435-439</ref> It is similar to at least 113 other chemicals in cannabis, known as cannabinoids,<ref>{{Cite journal|title=cannabinoids|url=https://medical-dictionary.thefreedictionary.com/cannabinoids|journal=The Free Dictionary}}</ref> but not all of them will cause people to feel different or high after using it.<ref>{{Cite web|url=https://www.leafly.ca/news/cannabis-101/list-major-cannabinoids-cannabis-effects|title=A list of major cannabinoids in cannabis and their effects|date=2017-03-24|website=Leafly|language=en-US|access-date=2020-06-24}}</ref> There are about 540 chemicals in cannabis total. THC is a very [[Lipid|fatty]] chemical and does not interact with water very well. THC is thought to be used by the plant for protection from [[Insecticide|bugs]], [[light]], and other harm from its [[environment]]. The THC chemical structure was discovered in 1964 by Dr. Raphael Mechoulam and Dr. Y. Gaoni at the Weizmann Institute in Israel.<ref>{{Cite web|url=https://cannabinoids.huji.ac.il/people/raphael-mechoulam|title=Raphael Mechoulam Ph.D.|website=cannabinoids.huji.ac.il|language=en|access-date=2020-06-24}}</ref> == Use in medicine == THC is used in [[medicine]] as a treatment for many [[Physical disability|physical]] and [[Psychology|psychological]] [[Disease|problems]].<ref>{{Cite web|url=https://www.drugabuse.gov/publications/drugfacts/marijuana-medicine|title=Marijuana as Medicine DrugFacts|last=Abuse|first=National Institute on Drug|date=2019-07-05|website=National Institute on Drug Abuse|language=en|access-date=2020-06-24}}</ref> It can be used to help people with [[pain]] or are sick from getting [[chemotherapy]] for [[cancer]].<ref>{{Cite web|ur