Best films about drug use and addiction?

[luckyjimm]

I recently rewrote a friend's essay on films about drug addiction. It got me wondering if there were some films I'd missed. These are the ones I know:

Total rubbish:

Requiem for a Dream (2000)
http://imdb.com/title/tt0180093/

Drugstore Cowboy (1989)
http://imdb.com/title/tt0097240/

Pretty good:

Pusher (1996)
http://imdb.com/title/tt0117407/

Pusher 2 (2004)
http://imdb.com/title/tt0396184/

Pusher 3 (2005)
http://imdb.com/title/tt0425379/

Fantastic:

Man with the Golden Arm (1955)
http://imdb.com/title/tt0048347/

Trainspotting (1996)
http://imdb.com/title/tt0117951/

Super-incredibly good:

Christiane F. - Wir Kinder vom Bahnhof Zoo (1981)
http://imdb.com/title/tt0082176/

What do you think of these films? Should the style of the film attempt to replicate the drug experience? Are all drug films, whether anti- or pro-, inevitably dishonest and partial? What would an honest film about drug-taking look like?

[I haven't seen Naked Lunch or Reefer Madness or Traffic.

I've seen but not included, where perhaps I should, Boogie Nights, Scarface, Fear and Loathing in Las Vegas and Human Traffic.]