Oh man, what does this do?
It boosts your stats -- and your health, if it's a strength derm. But beware! If you don't have enough health left to pay back the debt you've taken by getting high, you're in for death.
For example, if I have 45/45 health, and I take a derm for 60/60 health, and I get hit down to 14/60 health, and then the derm wears off, I'm at -1/45 health and I'm fucking dead, okay?
The drugs provide a convenient stat boost for those tough situations, and gives me another opportunity to advance subversive drug literature through the use of my games. Not to mention it also fills up another couple of the 16 inventory slots!