The Panic in Needle Park.
Kitty Winn (who looks about 12 in some scenes) plays a naive innocent who enters the world of Needle Park, a nest of New York junkies who include in their number one Al Pacino.
Hang around the barber shop long enough and sooner or later you'll get your hair cut.So it is in our heroine's case: it's not long before she goes from "heroine" to "heroin" and prostitution as well. Yes, dear, pick a junkie as your boyfriend. That would be a good life decision for you. Yes.
The drug squad cop who pops up from time to time seems to know very well that his role in the then-new war on drugs is a Canute-like exercise in futility.
Al Pacino gives a very good performance, in fact the acting is really good all round. There's a very small role for Paul Sorvino, who would go on to be the father of the more famous Mira Sorvino.
I like these old movies from the very early 70s, it's something to do with the kind of film they were using at the time. The colours and textures are very like the French Connection for example. I'm also reminded of a family story: in the early 70s my aunt came to visit us in Canada, and she had to pass through New York to do it. My da sat down and wrote a long, stern letter warning her about how dangerous New York was, and she took umbrage at this.
Here's the trailer, which makes it look like "Love Story" meets "The Godfather", which it isn't really: