I have read alot an antabuse, and it seems some people are immune to it, or tolerate it much better than others. Not real effective for them. Another issue is doseage, all good reasons to TALK TO YOUR DOC!
I have seen it mentioned in the reading I've done to try a drink or two under controlled conditions, to make you aware of the reaction. Never sounded like a good idea, since as some my be immune, others may be overly reactive.
Steve