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Cannabis smoke contains thousands of organic and inorganic chemicals, including many of the same carcinogens as tobacco smoke. [82] A 2012 special report by the British Lung Foundation concluded that cannabis smoking was linked to many adverse effects, including bronchitis and lung cancer. [83]
Vaping cannabis has led to permanent lung damage in some users Another rare side effect of cannabis involves a particular method of ingesting it, vaping, rather than the substance itself.
The long-term and short-term effects of cannabis use are associated with behavioral effects leading to a wide variety of effects on the body systems and physiological states. [14] CHS is a paradoxical syndrome characterized by hyperemesis (persistent vomiting), as opposed to the better known antiemetic properties of cannabinoids. [15]
The long-term health consequences from vaping is likely greater than nicotine replacement products. [83] They may produce fewer adverse effects compared to tobacco products. [84] They may cause long-term and short-term adverse effects, including airway resistance, irritation of the airways, eyes redness, and dry throat. [85]
The observed effects on memory and learning, they said, showed long-term cannabis use caused "selective memory defects", but "of a very small magnitude". [85] A study by Johns Hopkins University School of Medicine found that heavy cannabis use is associated with decrements in neurocognitive performance even after 28 days of abstinence.
The time to onset of effects depends strongly on stomach content, but is usually 1 to 2 hours, and may continue for a considerable length of time, whereas the effects of smoking or vaporizing cannabis are almost immediate, lasting a shorter length of time. [10] All of the active constituents enter the body when cannabis is consumed orally.
Critics of vaping bans state that vaping is a much safer alternative to smoking tobacco products and that vaping bans incentivize people to return to smoking cigarettes. [127] For example, critics cite the British Journal of Family Medicine in August 2015 which stated, "E-cigarettes are 95% safer than traditional smoking."
Cannabis smoking (known colloquially as smoking weed or smoking pot) is the inhalation of smoke or vapor released by heating the flowers, leaves, or extracts of cannabis and releasing the main psychoactive chemical, Δ 9-tetrahydrocannabinol (THC), which is absorbed into the bloodstream via the lungs.