+1
I like all of the proposed additions; a lot of the medications seem too powerful and take surgery out of play for medical.
If anything I believe your pain suggestion for Peridaxon is too moderate the fact that you are rapidly repairing your organs should take a great toll on the body (Potentially add fever as a side effect due to the rapid movement and formation of cellular structures). It should ideally be very painful, induce some kind of weakness, and should either: A.) take nutrition levels and/or B.) some Blood volume per unit metabolized to simulate tissue being formed out of actual nutrients.
Surgery shouldn't be only for broken bones/appendicitis, and giving some of the most powerful medication in the server should be balance by having some great side effects; requiring Nurses and the ICU to actually be utilized and/or give chemists the potential to develop crafty new ways to mix medications to counter the adverse effects. (Preferably both)
Side note, it would be really nice to add some anti-fever capabilities to Paracetamol since it does that in real life and there is no medication in game that actively combats just fever.