but what would make players take the drugs in the first place? you should make the drugs add a small boost in like strength or speed.
I agree that it should do something to the player, but I don't think it should be a huge benefit to them. When you take drugs in real life for the first time, it's mainly to see what happens (what it feels like). I think enough players, if not told of its effects, would take them the first time to just experiment. I wouldn't want
every player taking drugs just because it has a big benefit to them.
This could also allow for drug dealers to reel in customers and get them addicted to it. If they don't tell them that they will get addicted, then they will get a new customer who will come back for more.
This also gives me the idea of a drug dealer job (if there isn't one already). They get experience from selling drugs to people. I wouldn't allow them to get experience from selling it to the drug brick, but that's your choice. They get a discount on planting drug bricks. The more experience they have, the more drugs they get from each plant and so on.