Just don't make a 1 CHA character, it's the point of game balance. Since it's temporary 1 CHA can serve you much better than -1 PE (1 CHA = Buying/trading/getting professions, -1 PE = sitting out of fighting until it wears off, -1 PE isn't even that critical). Maybe with a perk (Drunken Master, for example), but not for normal.
I know it's the concept of Dutch Courage, but it just won't work. Stick to mentats.