The Panic in Needle Park (1971)
Rewatching for my The Complete Pacino list.
Very well acted by both Al Pacino and his co-star Kitty Winn, but therefore extremely difficult to watch people self-destruct in this way.
Al is edgy, incapable of being still, apart from when he’s drugged and out of it. Little wonder that this, his first lead role, commanded attention.