From the Resource Guide for Parents from NIDA, "Substance abuse and addiction are preventable disorders that interfere with normal healthy functioning, contributing to physical and behavioral health problems, injuries, lost income and productivity, and family dysfunction. While substance use generally begins during the adolescent years, there are known biological, psychological, social, and environmental factors that contribute to the risk that begin accumulating as early as the prenatal period. This creates opportunities to intervene very early in an individual's life and thereby prevent substance use disorders-and, along with them, a range of other related behavioral problems-long before they would normally manifest themselves."