The occasional abuse of anticholinergic drugs for their psychotropic and specifically hallucinogenic properties has been known for over a century, but benzhexol (trihexyphenidyl) abuse has only recently attracted attention in the literature, mainly in case reports. This paper reports on a study of 21 benzhexol abusers. They were a young, single, and disadvantaged group of polydrug abusers with poor employment, educational, and social skills, who abused benzhexol mainly for its euphorogenic properties. The two major diagnostic categories were antisocial personality disorder and schizophrenia. An unexpected finding was cognitive impairment persisting after acute intoxication.