Like someone above posted, I'm sure there are more uses for Intoxicated than just getting drunk on alcohol. Perhaps there will be a dedicated poison list and mechanics to handle that, but perhaps not, at least not at the simpler Basic or Standard options.
Intoxicated could be applied to certain poisonous effects, and perhaps the amount of DR is a little high, I could see how it applies, a body doesn't always react the same to outside stimulus (damage) when intoxicated.
How many times have you heard stories about people who do stupid things while drunk, and end up with cuts/lacerations, broken limbs, and not remember how they did that the night before. Sure they felt it later for sure, but, at that time perhaps they simply ignored the damage.