Some people are able to use recreational or prescription drugs without ever experiencing negative consequences or addiction. For many others, substance use can cause problems at work, home, school, and in relationships, leaving you feeling isolated, helpless, or ashamed. Individuals who begin using drugs as juveniles are at greater risk of becoming addicted compared to those who begin drug use as an adult due to the immaturity of the teenage brain, particularly of that part of the brain that controls impulses.