Here is some more info for you all:
My dealer got a bunch of this methamphetamine stuff a few weeks ago as a dope re-up and couldn't sell it after people realized it was mostly methamphetamine or some other stimulant. He put it into glassine bags (white ones, the stamp was the word 'FILE' enclosed in a circle if that sounds familiar to anyone) like it was heroin (because it was supposed to be heroin). He has since re-upped on his usual awesome dope and the last time I bought from him he just gave me a bundle (which is about a gram here, give or take) of the methamphetamine stuff and told me to do whatever I wanted with it. The stuff looked like regular dope, except it was a little bit too much on the white side. The good (real) dope we get here is slightly off-white, so it was hard to notice really. The meth stuff burns like crazy when you snort it, it makes your nasal cavities feel like they are being bitten off (and how you would bite off a cavity is beyond me

). It is definitely not coke because it lasts way too long. When you shoot it there is an initial dope like rush, which is soon overpowered by a strong stimulant feeling, instead of the usual relaxed opiate feeling. Still euphoric, just different (opiates are my DOC, I'm not really into stimulants at all) My history with methamphetamine has only ever involved eating, smoking or snorting, so I have no prior experience with shooting it. Oh yeah, the good white dope around here (that I get at least) usually dissolves completely in lukewarm water, leaving behind no visible insoluble particles. This stuff left a lot of tiny but visible particles behind in the spoon and on the cotton.
Methamphetamine is a pretty unusual drug in this city, so who knows what the stimulant actually is. While methamphetamine is by no means popular here, it is certainly available if you know the right people. You definitely can't get it on the street (and apparently you can't sell it either!) like crack, heroin, or coke (Philly's 3 main drugs in order of street availability, as far as I can tell).
My heroin dealer is from a heroin/crack block in North Philadelphia (I go through him so I don't have to go to "the block" to score), and the way I understand it he supplies a few small blocks with dope, which is usually really very good--some of the best dope I've ever had. I know he buys in bulk and bags it out in glassines for street sale. So I know he has a pretty good source. He warned me that it was cut with "crystal-meth" (his phrasing) but it was hard to resist what looked like a free bundle and I tried it anyway. The result: I've been up for over 24 hours. It seems to be mostly stimulant. The initial dope like feelings might be a placebo of sorts or just too easy for me to confuse with the IV stimulant rush since I have no experience with it.