Haha I just saw Buffalo Soldiers. That was more about an underground trade (which happened to be the illicit production of heroin) than drug use = or cocaine.
16
There is some british movie about some young girls, don't recall the name. About some girl trying to be popular and she hooks up with a guy who's total scum.
Basic (only about underground coke trade, no real use)
Boogie Nights and Wonderland seemed the same to me, both really dark and fucking sucked. Terrible movies, BN more so.
Requiem for a Dream can be about any drug. It is only implied what is an upper and what is a downer in each case. The movie was intentionally left vague, as was the book. It could have been dexies, meth, heroin, coke - whoever read the book too, you should know that the plot is much deeper than trying to identify specific drugs.