Weed, also known as marijuana, cannabis, pot, or ganja, is one of the most commonly used psychoactive substances in the United States.(Source) While many people use cannabis without developing a use disorder, research shows that it can be addictive for some individuals.(Source)
Current estimates suggest that about 3 in 10 people who use marijuana meet criteria for marijuana use disorder at some point, and the risk is higher for those who start using in adolescence or who use daily.(Source) Teens and young adults are especially vulnerable because their brains are still developing, and frequent cannabis use can affect learning, memory, and mental health.(Source)
As of 2026, marijuana remains illegal at the federal level in the United States, although many states have legalized medical and/or recreational use.(Source) Legal status does not mean a substance is risk-free. Alcohol and tobacco are legal but can still cause addiction and serious health problems. The same is true for cannabis.
If you feel unable to cut back, experience cravings, or continue using weed despite problems at work, school, or in relationships, you may be dealing with a cannabis use disorder and could benefit from professional support.(Source)