Since the OP mentioned NA, I'll stick to that.....
Others here have used the terms sober/sobriety; these are AA terms (the AA definition of sober is 'freedom from alcohol' --- no mention of any other drugs). In NA, the term for abstinance/recovery is 'clean' (freedom from all mind-altering subtances--including alcohol).
......as has been stated by kmangel and Freedom1990, earlier in this thread, alcohol IS a drug, and drinking alcohol would be considered a 'no-no' a relapse in NA.
As it states in NA's Basic Text; Chapter Rour, How It Works; in the fifth (5th) paragraph following the steps is says.........:
"...Thinking of alcohol as different from other drugs has caused a great many addicts to relapse. Before we came to NA many of us viewed alcohol separately, but we cannot afford to be cofused about this. Alcohol is a drug. We are perple with the disease of addicion who must abstain from all drugs in order to recover..."
(o:
NoelleR