Andash, my sons doctor gave him the choice of Naltrexone, Vivitrol , or antabuse. The naltrexone and the Vivitrol do the same thing, but the Vivitrol is given in monthly injections. He felt that the Vivitrol is the most effective. We chose antabuse becaus elf the fear of illness and did effects. Eventually I believe the doctor will move towards the naltrexone or Vivitrol once he feels my son has enough commitment to avoid alcohol on his own.
I was told that you will feel no effect from alcohol therefore reducing the urge to drink.