I am sure this question has been posted before, but I thought it would be interesting to see what ppl are shooting these days
My list includes:
-methamphetamine
-cocaine
-dexedrine
-klonopin
-oxycontin
-MS contin
-roxycodone
-dilaudid
-percocet (DO NOT EVER SHOOT PERCS!!! I nearly died)
-ketamine
-heroin
and that's all I can think of at the moment.
How about a little Jack Daniels!!
I will put my list up after this brief story:
Was on a 3-4 day cocaine blasting binge (back in the 80's) and when I ran out, and had no Benzo's or anything to stop the MAD 'Jonesing' I half filled a 1cc rig with Jack Daniels, and believe it or not, it calmed me down right away, and aside from a little heartburn, there were no crazy side effects. I would NOT recommend this to anyone (although I did it several times after that particular event, I think I even used Vodka one time), and as someone said, I have never really injected any uppers aside from coke

, which is probably a good thing cause I have heard injecting Meth is the start of a dangerous love affair!!
Heroin
Cocaine (and the combination of those two of course)
Klonopin
Liquid Morphine Sulfate (living in Costa Rica for 12 years, this was very easily obtainable, and mixing it with the 85% pure coke was a nice ride also)
I also tried to shoot Percs and Vicodin, but with such a high B/A with oral administration, it's really not worth it and very dangerous, but as you stated, I myself don't take my personal safety into account once I start a run on cocaine, which I haven't touched in 6-7 years and don't plan to again!
Dilaudid (this is the monster that started me back on jabbing-up after getting it in the hospital after 6 years of abstinence, and was so fascinated at the rush, that I'm on a constant mission, and use it daily....usually cold shaking pills, but have access to liquid 'HP' [high potency] Hydromorphone, and when I can afford it, prefer that to ANY substance on the planet)
WARNING: DILAUDID-HP (high potency, 10 mg/mL ampules and vials) is a more concentrated solution of hydromorphone than DILAUDID INJECTION, and is intended for use only in opioid-tolerant patients. Do not confuse DILAUDID-HP with standard parenteral formulations of DILAUDID or other opioids, as overdose and death could result.........This is some very heavy duty shit....usually reserved for those poor souls in Hospice counting down their last weeks/days/hours! 10mg's is equivalent to about 40-50mg's of crushed up pills!!
Valium
Oxycodone
Oxycontin
Oxymorphone
Fentanyl
Avinza (extended release Morphine Sulfate)
Adavan
Xanax
Demerol
Methadone
Whiskey 
(that would be the 'Jack')
NOW, if I could only get a 'PICC-LINE' installed I would have it made as this 52 y/o body's veins are getting harder and harder to find
I'm probably forgetting a few, but I just did a whack of 'HP' Hydro and it kind of distorts my memory, amongst several other normal human functions lol, but if I think of any others, I'll add them later.
Stay Safe!!!