With that said, since the Fallout series doesn't have magic, I don't really see this strategy working here (unless there's some skill or perk that significantly improves your ability to heal).
Drugs are like magic. Stim packs are weightless and easy to come by, and work instantly with no negative side effects, and for 4 AP you can enter your inventory and take as many as you like (for no additional AP, if I didn't make that clear), making e.g. super stim packs pointless except as an assassination tool.
This is true, as it doesn't take long to hoard an obscene amount of stimpaks. I ended up with so many by the end of the game and I didn't buy a single one.
Superstims are beyond pointless (apart from assassination) as they reduce your HP after a short while and they have weight.