The First Aid skill is only very marginally useful in the early game, and all but useless in the mid and late game. I think the concept of the skill is nice, but it's simply not powerful enough.

Therefore, I propose the following:

* Either the amount of HP that it recovers or the probability of success should be buffed.
* PC's with a high First Aid skill (>=80?) should have a chance to actually eliminate poison by applying the skill.

I think those changes would make the skill more interesting.