Alcohol definitely blunts fast reflexes. If it also hinders coding, it's not for the same reason. If I had to guess, a little could fix anxiety and perfectionism, while a lot will leave you too incoherent to make something work at all.
> If I had to guess, a little could fix anxiety and perfectionism
This is exactly what happens to me, so I sometimes will code after a bottle of beer or a glass of whiskey. But it has to be little - more alcohol and I start losing focus.