Dr.Champ couldn't of gotten drunk

Dr.Champ drunk a bottle of vodka and he got drunk turning him into a alcoholic but that wouldn't be possible. In the very first episode Bojack says "Todd, I way over 1,200 pounds. It take a lot of beer to get me drunk" it zooms out and we see 49 cans/bottles and a keg of beer. This the amount to get Bojack drunk. By looking and Dr.Champ and Bojack they have similar weight so we can easily assume that Dr.Champ is also over 1,200. While vodka does have 40% alcohol and beer only has 5%, about 8-10 cans/bottles of beer is the same amount of alcohol to one bottle of vodka. So one bottle of vodka shouldn't be enough to get Dr.Champ drunk