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Metabolites of cannabis are usually detectable in urine drug tests from 3 days up to 10 days according to Redwood Laboratories; heavy users can produce positive tests for 30 days or longer after ceasing cannabis use. [2] [3] The length of time may vary to some degree according to metabolism, quantity, and frequency of use. [4]
A 2013 literature review said that exposure to cannabis was "associated with diseases of the liver (particularly with co-existing hepatitis C), lungs, heart, and vasculature". The authors cautioned that "evidence is needed, and further research should be considered, to prove causal associations of marijuana with many physical health conditions ...
A large study from the University of Colorado found heavy cannabis use is linked to reduced brain activity. Lead researcher Joshua Gowin and neurosurgeon Paul Saphier discuss the impact on health.
Cannabis use disorder (CUD), also known as cannabis addiction or marijuana addiction, is a psychiatric disorder defined in the fifth revision of the Diagnostic and Statistical Manual of Mental Disorders and ICD-10 as the continued use of cannabis despite clinically significant impairment. [2] [3]
heavy cannabis users — used more than 1,000 times over their lifetime moderate users 10 to 999 times used during their life nonusers who used cannabis less than 10 times.
Regular heavy marijuana use may increase a person’s risk of developing ... The study found that heavy cannabis users were between 3.5 and 5 times more likely to develop head and neck cancers ...
Heavy marijuana use may fuel anxiety disorders, new research finds. This age group is most at risk. Erin Prater. February 5, 2024 at 6:30 PM. Getty Images.
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.