Thanks everyone for the replies! The thing is, my addiction and alcoholism are like peas and carrots. I don't have the urge to use unless I am drinking. Using is a major consequence of drinking for me, and a big fear and a lot of motivation for me to quit drinking. There are of course many other consequences to my drinking, but using is one of the biggest. When I do share and open up, it will be hard to be honest without mentioning the drug addiction aspect. I don't plan to dwell too much on the drug part, and in fact most likely won't even get in to naming the drug of choice. But I will be miffed if someone has a problem with me talking about the worst consequences of my drinking... the using. Everyone else talks about the consequences of their drinking, I don't know why I shouldn't be able to be completely honest just because drugs are involved.
Probably this won't be a problem though.