When I first saw this film many years ago, I was put off by its slow and fragmented first ten minutes, featuring scenes of (gratuitous!) drug use in various parts of the world. Also, I had just seen David Hemmings' other Italian crime film from this year, SWINDLE with Tomas Milian (directed by Bruno Corbucci), which was INCREDIBLE, and this did not seem as good. However, once the film kicks into gear after fifteen minutes or so, it is quite good and features some incredible stunt work, imaginative action sequences, exciting guitar-driven music from Goblin (not as repetitive as some of their work), a wonderful over-the-top performance by David Hemmings as an interpol narcotics investigator, and a cool, smoldering performance by Fabio Testi as an undercover cop out to bust the international drug trade. As a later 70s product, this film features unnecessary closeup shots of drug use and some gratuitous nudity (a lesbian scene presented as a FANTASY of a minor character!), but there's not enough of either to derail what becomes a nail-biting action film. The final fifteen to twenty minutes of HEROIN BUSTERS are incredible--the motorcycle chase in the subway, which leads into an outrageous airplane chase--some of the most interesting and daredevil action-film stunt-work I've seen in a while. The film also has nice bursts of humor here and there (such as when Hemmings, chasing a crook, gets a ride from a young lady on a motorcycle and has to grab on to her breast to hold on!) and was quite satisfying on all levels. It does start slow, however, so don't give up on it (or fast forward through some of the initial scenes). What a "golden age" of Italian crime films the 1970's was--even a standard genre entry turns out to be a gem, the likes of which would NEVER be made today.