When dealing with a child who is using, get help.  We cannot see our 'blind spots.'  Furthermore, drugs and alcohol make the child difficult to understand and we need all the help we can get.  In addition, get it from an expert.  There is much inaccurate information about this problem and how to handle it.  the last thing you need is more confusion.  Get a licensed therapist to help you.

Love and Peace,

Doc Pete, the imperfect therapist