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Close up of a Cannabis plant. Cannabis (/ˈkænəbɪs/) is commonly known as marijuana or hemp and has two known strains: Cannabis sativa and Cannabis indica, both of which produce chemicals to deter herbivory. The chemical composition includes specialized terpenes and cannabinoids, mainly tetrahydrocannabinol (THC), and cannabidiol (CBD ...
Nabiximols (brand name Sativex), an oromucosal spray made of a complex botanical mixture containing cannabidiol (CBD), delta-9-tetrahydrocannabinol (THC), and additional cannabinoid and non-cannabinoid constituents from cannabis sativa plants, was approved by Health Canada in 2005, to treat central neuropathic pain in multiple sclerosis, and in ...
CBD shares a precursor with THC and is the main cannabinoid in CBD-dominant Cannabis strains. CBD has been shown to play a role in preventing the short-term memory loss associated with THC. [29] There is tentative evidence that CBD has an anti-psychotic effect, but research in this area is limited. [30] [24]
Widely cultivated strains of cannabis, such as "Afghani" or "Hindu Kush", are indigenous to the Pakistan and Afghanistan regions, while "Durban Poison" is native to Africa. [82]: 45–48 There are approximately 16 landrace strains of cannabis identified from Pakistan, Jamaica, Africa, Mexico, Central America and Asia. [84]
Cod-THC (Codeine Δ 9-tetrahydrocannabinol carbonate) is a synthetic codrug formed by linking tetrahydrocannabinol with codeine via a carbonate bridge. It is well absorbed orally and shows superior analgesic effects in animal studies compared to a simple mixture of the two drugs.
Cannabis also has a long history of being used for medicinal purposes, and as a recreational drug known by several slang terms, such as marijuana, pot or weed. Various cannabis strains have been bred, often selectively to produce high or low levels of tetrahydrocannabinol (THC), a cannabinoid and the plant's principal psychoactive constituent.
THC, the main psychoactive component of cannabis, may only be detectable in saliva and oral fluid for 2–24 hours in most cases. [8] [9] The main metabolite excreted in the urine is 11-Nor-9-carboxy-THC, also known as THC-COOH. Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10]
Oral cannabis extract and THC both were rated as possibly effective for improving objective measures of spasticity. [73] [74] Centrally mediated pain and painful spasms. Based on the results of 4 high quality trials and 4 low quality trials, oral cannabis extract was rated as effective, and THC as probably effective in treating central pain and ...