Besides, the mentats thingy to gain charisma in order to do quests is totally stupid.
The problem is that it is a stupid system first of all, the second thing is, I don't see why I would make characters with charisma if I can save SPECIAL points due to the use of a drug. I have more points in another SPECIAL part, but I can still do everything as if I had as high charisma as other players. Fair ?