Lsd is effective treatment of alcoholism, or rather it has potential as you would need to consider set, setting and so on. Used irresponsibly it could instead have a negative effect, so I would recommend to do some reading beforehand and to also have a sitter present who can help to guide through the journey. Stanislav Grof deserve to be mentioned.
LSD helps to treat alcoholism - Nature
Retrospective analysis shows hallucinogenic drug helped problem drinkers.www.nature.com