How can rs alcoholism effect chemotherapy?

I don't know what: "rs alcoholism" means. I know of no such acronyms or letters that modify the word alcoholism in some way. Alcohol causes cancer, is a promoter and even potentially an inducer, plus it has a godawful number of drug interactions where it induces enzymes that metabolize all sorts of other drugs. Bad idea to mix the two, although modest amounts (a glass of wine, or a drink or two0, probably not bad.