Murray, speaking of euphoria, there's a guy who advocates taking Naltrexone only when one drinks. One usually takes it while abstaining, but since it blocks the opioid receptors, one wouldn't get the extra hit of dopamine and euphoria if one drinks while taking it.
The Cure for Alcoholism by Roy Eskapa
Amazon.com: The Cure for Alcoholism: Drink Your Way Sober Without…
If taken every time one drinks, one wouldn't get the reinforcement of extra dopamine, and one would gradually unlearn the behavior that caused the dopamine reward because of the lack of reinforcement. Essentially, it would reprogram someone to drink like a "normal" person.
I dunno. Like I said, I think I need all the dopamine I can get, but it's an interesting idea.