Your biology, social environment, and age or stage of growth seem to affect how likely you are to get addicted. The more risks you have, the greater the chance that taking drugs can lead to addiction. As an example, sometimes addictions run in families with a strong genetic link. Your social environment, including friends or colleagues, may also influence addiction. Equally important is your stage of growth. Studies show the earlier someone begins to abuse drugs, the greater the chances are that the addiction may lead to more serious problems.