I never injected anything, that was crossing the line for me. Don't confuse this with that stuff from 'Breaking Bad', its not the same.

That is Crystal Meth, and I haven't tried it and wouldn't have then.

I remember having a book then called 'Drugs in Perspective' which looked at things from an alternate viewpoint.

All the ones I tried were not deemed 'bad ones' according to the book and nothing particularly bad happened to me due to using its advice.