I'm not sure how warranted some of these comments are; I understand that in one's experience and from one's observations, taking cocaine intravenously may appear to be worse than anything else, but even still, I think it's a relatively subjective thing.
But, at any rate, I've recently begun to take my heroin intravenously and it's pretty terrific. I'm not sure how much I regret doing it. I hadn't made the decision under some assumption that I'd somehow use less dope and then be able to save money or anything at all like that, so it's exactly what I thought it would be and exactly what I expected. It hasn't turned my addiction into anything more crazy, insane or less manageable than before. So, it's whatever... just sucks when ya can't hit a vein, finally register, and then slip out ... *cringe*