One of my cycling mentors completed this event
while drinking his normal fifth of bourbon daily, plus plenty of Canadian beer. RIP Rudy.
Then there was the patron saint of cycling drunks, Freddy Maertens. Standard procedure at the starting line was to open a magnum of his sponsor's champagne, empty his water bottles, fill them with the good stuff, drink down what did not fit. Of course he drank quite a bit before starting line. Won 400 professional races that way, two worlds champs, gave Eddy Merckx problems. Still living.
Not every drunk is the same. Very diverse disease.