Here is another one I just started watching so I'm not sure what it's like, but it was made by HBO in 1999, so it should be interesting none-the-less. It's 8 parts on youtube.
Black Tar Heroin
Black Tar Heroin
Black Tar Heroin is a 1999 documentary directed by Steven Okazaki. Filmed from 1995 to 1998 in the Tenderloin, San Francisco, California, the documentary offers the viewer a sobering dose of reality about the lives of black tar heroin addicts.
The film follows a simple structure, and shows the drug-related degradation of five youths (Jake, Tracey, Jessica, Alice, and Oreo) during the course of three years. The film is brutal in the depiction of drug-related crimes and diseases: prostitution, male prostitution, AIDS, and lethal overdoses. The director also put a lot of emphasis on the moral sides pertaining to the junkie lifestyle: from the question of robbing other people for money to the degradation of family relations and loss of friends, a wide scale of highly unconventional problems are exposed.