Disulfiram
"So, I've been battling alcoholism for years - about a decade (and I'm 30). I've been to 2 treatment centers and an outpatient program with the longest stint of sobriety being a solid 109 days. I've gone from being 100% alcohol dependent in my mid 20's to sober to recreational drinking, but almost always I'll end up on benders or sneaking it. Anyway, I tried Antabuse about 6 months ago and took it for about a month...drank on it repeatedly and got so sick each and every time so I just stopped taking the pills. I'm talking beet red face and neck and chest, heart  racing, etc. I'm back on it now. I started yesterday and vowed to take it for 6 months."