Alcohol problems- son

Has anyone any experience with an adult son drinking too much?
I’ve just discovered a cast number of empty wine bottles at my 32 year old son’s place. They have been consumed in the past 5 weeks because I helped him clean up 5 weeks ago. I reckon my husband drinks 50 bottles a year and there were at least 50 bottles there plus some beer bottles. I’ve spoken to him and he agrees he needs to cut back … but I want to help him before it’s too late and I don’t think he can do it on his own… or will even really try…