You're brave to tackle such a complex problem. And, you're right, it's so important to deal with this as early as possible. In the home.
Whether we're aware of it or not, our first lessons are learned by observing our family even before we can talk. I think adults often forget how much their own behavior affects the future behavior of their children. Telling children how to behave is easy, showing them how to behave should be the real goal.
And, yes, stop drugging them!
The entire foundation of who you will be is formed before the age of six.