Requiem for a Dream [2000]
This is a very hard movie to watch, it depicts lives of four drug addicts and their downward spiral into emptiness. 
Along with their miserable lives, this movie also critics American society, television and drugs in general. Unlike The Trainspotting that had more humorous view on drugs this movie is something that is the ultimate deterrent from drugs. Trying to break their chains with this habit and to live a life at the same time is hard thing to do. Magnificent performances from all actors, especially Marlon Wayans. He really showed his acting ability in this flick. So get ready for some really fucked up movies. Enjoy, or try to enjoy.
Director: Darren Aronofsky
Cast: Ellen Burstyn, Jared Leto, Jennifer Connelly, Marlon Wayans, Christopher McDonald
Rating: 
http://www.imdb.com/title/tt0180093/
absolute masterpiece!
Great acting, and good music. This movie is one of my favorites,
All of the people who i have tipped for this great flick came back with positive feedback.
Also Jennifer Connelly ones again brilliant here.
Agreed with the 10 rating!