Is marijuana addictive?

Contrary to common belief, marijuana can be addictive. Research suggests that 30 percent of users may develop some degree of problem use, which can lead to dependence and in severe cases takes the form of addiction. People who begin using marijuana before age 18 are 4 to 7 times more like than adults to develop problem use. Dependence becomes addiction when the person can't stop using marijuana even though it interferes with his or her daily life.

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