Physical Effects

The physical effects of marijuana can be immediate and long-term. Marijuana smoke can contain higher concentrations of the same compounds that cause cancer as tobacco. The long-term effects have recently become a more popular research topic, along with the increasing popularity of the legalization of marijuana use. 

The perception of dependence on marijuana varies widely among Americans. Where most believe marijuana not to be addictive, the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, and the National Institute on Drug Abuse both identify marijuana as being addictive. The body can become physically dependent on marijuana and rely on it. Withdrawal symptoms can include a loss of appetite, restlessness, and irritability. Marijuana dependence is treated similarly to other substance abuse problems. This may include detoxification, therapies, or support-group meetings.