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The argument is that Marijuana has medical benefits
So does morphine.
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You can't become physically addicted to marijuana or overdose from marijuana
So, that doesn't justify it.
Marijuana use can lead to the development of problem use, known as a marijuana use disorder, which takes the form of addiction in severe cases. Recent data suggest that 30 percent of those who use marijuana may have some degree of marijuana use disorder.
18 People who begin using marijuana before the age of 18 are four to seven times more likely to develop a marijuana use disorder than adults.
19
Marijuana use disorders are often associated with
dependence—in which a person feels withdrawal symptoms when not taking the drug. People who use marijuana frequently often report irritability, mood and sleep difficulties, decreased appetite, cravings, restlessness, and/or various forms of physical discomfort that peak within the first week after quitting and last up to 2 weeks.
20,21 Marijuana dependence occurs when the brain adapts to large amounts of the drug by reducing production of and sensitivity to its own endocannabinoid neurotransmitters.
22,23
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If you want to take an illegal substance and abuse your body, go ahead buddy. I will not support a drug that clearly affects the mind and
Apathy, lost productivity, addictive disease, deterioration in intellectual function, motor vehicle accidents, and psychosis are all among the negative outcomes. All from a product that has no demonstrated benefit. For nearly all conditions for which marijuana has purported benefits, we already have existing medications - safe medications - demonstrated to have value."