I take Antabuse but here in the Netherlands it's sold as a 400 mg tablet, I have to dissolve it in a glass of water. I take 1 tablet every week, used to take two but then I smelled like garlic and had that metallic taste. Also I can't drink for over a week after taking one, not just 48 hours.
Right now it works great for me, walking past a liquor store without that doubt and temptation.