My ex-H had problems with perscription meds. Unfortunately he has relapsed since we split. I cannot say that I wish I had left the door open because he also had serious, underlying mental health issues. In "recovery", without the blunting effects of the drugs, his mental health issues have become ever more apparent. He has not held a job since we split, he has not maintained a R since we split, he still blames everyone but himself for his issues. Only you can decide if or when your situation gets this serious.
Don't use statistics such as the "worst age" for divorce. The single most important predictor of children having problems post divorce is if the parents continue to argue. I NEVER argue with my ex-H. He levels diatribes at me that rival when we were married and I say, "I'm sorry you feel that way. I can't continue to talk with you when you talk to me like that." I always encourage him to see the kids even though he has never paid child support as he was supposed to. Our financial and/or court related concerns have nothing to do with his R with the kids. I have set the boundaries now that I should have set in the marriage.
So, how about, you set the boundaries that you will need regardless, you do whatever you can to GAL, inform yourself on your states divorce/separation laws, you insist on treatment for your H. In the meantime, spend time with your children, love them and make sure they know that they have one stable parent.
