Hi CB,
I was thinking along the lines of Nigey. I'm a recovered alcoholic and the only problem I had with drugs was a puff of weed lead immediately to a drink. I was never interested in drugs and remain very wary of any mind altering chemicals. It just wouldn't occur to me to take up another drug. Except I did used to smoke but that's another story.
We have a few NAs at our meetings and while some of them remain substance free, from what I am told, the use of alcohol is not unusual. Then again, in AA there are those still dependent on drugs, whether illicit or prescribed.
For me the only safe path seems to be total abstinance from all mind altering substances.