My stbxah took Antabuse on and off as part of his halfhearted attempt to get sober. Shockingly, it was unsuccessful.
He took it when he really didn't want to drink, went off it whenever a drinking function was on the horizon, and sometimes even took it and then drank anyway. (I asked him how that felt and he said he felt awful. But still he drank.).
I think it is more widely prescribed outside of the US, and I understand that for people who are committed to recovery, it can help.