I don't know. That is basically the concept around synthehol from Star Trek, but I have never been convinced that such a substance would actually be as good as alcohol. Being able to easily "turn it off" does not seem particularly desirable to me, part of the allure of alcohol is a submission of sorts. Making the decision to not be able to make rational decisions, with no tap-out.

Edit: Figure out how to do it with other sorts of drugs, like non-recreational stimulants, and I would be all over it. Caffeine that I can turn off when I get home? Yes please.