I have been going to Al Anon for 2 months and my husband is not an alcoholic. He's an addict who sometimes mixes his pills with alcohol.
I have found it HUGELY helpful. And there are other people in my meetings that have addict spouses or children too.
We will be best off looking for SIMILARITIES amongst us and the others in the groups, rather than the differences. Our minds's tendency to say "these people are not like me" is the kind of thinking that can prevent us from getting support and help.
So try to keep an open mind and give the Al Anon meeting a try. Where they talk about "alcoholics" or "alcohol" you can interchange "addict" and "drugs" in your mind as needed.