Don't shoot into the neck. I got to this stage in my addiction. It's when I could no longer shoot into other veins because they almost all collapsed. I have missed in my neck and that sucks the big one. Just stay on the arms and rotate.
Tricombs got it all right. I wasn't sure about hitting that one. So I'd thought that I would ask.
One my other hand I thought that there was more addicts on here than single minded bafoons. And stop telling me to get methadone or suboxone I'm not a heroin user.
Just because some of us might be addicts doesn't mean we do stupid things like considering IV administration of drugs into the neck. Seriously check into rehab to give your veins a break from whatever your IV drug of choice is. When you get out and if you still feel like using, at least your veins will be in better shape.