...sigh...I wasn't going to respond to this thread because I figured you'd all think I was a scumbag but what the hell, who cares. My list (as well as I can remember that is):
marijuana
alcohol (I believe it's a drug)
caffein
nicotine
psilocybin (mushrooms)
peyote
acid
hash
phenobarbital
quaaludes
pcp (unwillingly dosed with it)
methamphetamines
other speed (black beauties, whites, etc.)
amyl nitrate
Vicodin, codein, percocet, percodan, demerol, darvocet, norco, etc. etc. etc.
cocaine
valium, xanax
celexa
ghb
opium
heroin
methadone
clonidine
Hope I didn't I miss anything...it's a little hard to remember.