I couldn't remember the name of the Warhol film. I hunted through the article, hoping for recognition, but none came. So I started hunting online and found it: Trash. It's about heroin addiction, and it is the most unlovely film on that subject I have ever seen. It really stuck with me a long time. If Warhol was interested in turning people off heroin, this was the way. Funny it didn't seem to work for his own crowd.
I almost bought a poster of the film. I'm still thinking about it.