((never))
HUGS to you honey - how tough to be in that situation - I do think like the others have said it may be time to seek whatever legal advise you can get to protect your precious son from exposure to unhealthiness.
After all (and I know this is an extreme example but hey it works) if you knew there was an outbreak of "swine flu" at school - wouldn't you do everything possible to keep your child away from exposure to that deadly virus?
So why not do all we can to keep our loved ones from being exposed to their parents when those parents are acting "deadly and unhealthy" toward themselves and others? It doesn't mean that it has to be a permanent situation - it can just be until his dad gets to a place where the drugs are not the main focus of his life - prayerfully that will happen someday for him.
HUGS to you again Never - Remember make the best decision you can according to the guidance from your HP and trust that HP to take care of the rest.
Rita