There aren't really any drugs that are being used. There's that crime thing in the crime section about meth, but you get money for it and so we aren't really using any drugs in this game.
I was thinking it should be time to create a little more action in the game if the people in charge accept what I have to say.
Now using Drugs... Every gang pretty much uses drugs of some sort and a good way to use it in the game would be to use a drug for energy refills so that we can go and attack people much faster than waiting all the time and the beginning drug should fill up to the top of the energy refill or close to it and especially for the new levels. But here's the catch, the more you use a drug the less the energy refill and the only way to gain higher energy is to buy or obtain a ever greater more expensive drug than before, and the higher the level the more powerful the drug should be or more expensive. Now there should be some overdosing as well that could get you into the hospital as a drawback if you use too much
The only part I'm not sure about is where to obtain the drugs, maybe a drug dealer in a certain city? (where you buy the other things.)
So this is my suggestion about Drugs because I think every gang should have some and it would (I believe) improve the game a bit.
Let me know thanks.