We all know the arc of a drug addict movie; drugs are fun, until they're not. Drugstore Cowboy keeps the stakes low and calmly drifts along with aloof swagger, not opting for Requiem for a Dream level theatrics. So what it gains by not being over the top, it loses in truly gripping drama. Points for a near autobiographical cameo in what would be the twilight years of William S. Boroughs' life.