Marijuana is addictive. Approximately one in 11 adults who use marijuana will become addicted, and the risk of addiction is greater among youth.
Marijuana now available is more potent with greater levels of tetrahydrocannabinol, or THC, the primary psychoactive substance in Cannabis than marijuana available in previous decades. The long-term health or developmental consequences of exposure to these high concentrations of marijuana are unknown.
Marijuana use is associated with adverse health outcomes including development of psychoses like schizophrenia and increased risk of motor vehicle crashes.....
