just a few points; my understanding is that quinine is present in #4 heroin. In fact I would argue that quinine was present in far greater quantities with the dope one was getting in the late 90s. The rush from that dope was wild and consistent with the fact with the effects of quinine. also if you have a look at the thread I just
posted there is a possibility that quinine in its interaction with something in the user is responsible for death as opposed to the blanket claim that it was an "overdose".
I can attest to this, nearly every single deal I've ever purchased has tasted quite bitter. One could be mistaken in believing this implies its pure but far from it. As I've read pure heroin has barely any taste whatsoever.
also i'm australian and have seen #3 heroin. Your right though its not as common as #4 but its around.
lastly do you have any material that talks about the dangers of injecting quinine?