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Acute effects while under the influence can sometimes include euphoria or anxiety. [ 4 ] [ 5 ] Although some assert that cannabidiol (CBD), another cannabinoid found in cannabis in varying amounts, may alleviate the adverse effects of THC that some users experience, [ 6 ] little is known about CBD's effects on humans.
Over time, the marijuana gateway hypothesis has been studied more and more. In one published study, the use of marijuana was shown not a reliable gateway cause of illicit drug use. [67] However, social factors and environment influence drug use and abuse, making the gateway effects of cannabis different for those in differing social circumstances.
Acute negative effects may include anxiety and panic, impaired attention and memory, an increased risk of psychotic symptoms, [b] the inability to think clearly, and an increased risk of accidents. [ 51 ] [ 52 ] [ 53 ] Cannabis impairs a person's driving ability, and THC was the illicit drug most frequently found in the blood of drivers who ...
A participant in a study on the effects of cannabis, shows the marijuana flowers he has grown in his backyard, in Longmont, Colorado, U.S., December 19, 2019.
The rising numbers of adverse effects occurring in the wake of legislative reform of marijuana are disturbing. ... use” and a high potential for abuse and physical or psychological dependence ...
A cloud of marijuana smoke rises as a clock hits 4:20 p.m. during the Mile High 420 Festival in Denver on "weed day" in 2022. - Patrick T. Fallon/AFP/Getty Images/File
Short-term use increases both minor and major adverse effects. [116] Common side effects include dizziness, feeling tired, vomiting, and hallucinations. [116] Long-term effects of cannabis are not clear. [120] Concerns including memory and cognition problems, risk of addiction, schizophrenia in young people, and the risk of children taking it ...
A survey of American adults found that many erroneously believe it is safer for the lungs to smoke weed than tobacco, and that any secondhand smoke from marijuana is also safer.