Most children are curious about drugs, but don't want to try them. If they ask you questions about drugs, answer honestly, but do not threaten or blame your child. Be honest about your fears and feelings when you talk to your child. By the time a child gets to high school it is too late to talk to them about drugs. They have already been exposed, and probably know peers that use drugs.
Parents have much less influence over their children than peers do.
They have seen how some kids can take drugs and seem to be OK, so they think that the scary stories that they have heard are not true. Teens want to fit in and be cool, so it is important that they have groups in their lives that do not use drugs. Be involved in your teen's life. Know who their friends are, and what they like to do. Know where your children are, especially at night.