Hanfried Helmchen

A critical review of the early clozapine trials published in German and a discussion of the many unresolved issues left by these trials

Clozapine was (1) first introduced in Austria and Switzerland in 1972, (2) associated with 8 Finnish deaths due to agranulocytosis in 1975 (almost leading to its withdrawal), and (3) approved in the United States (US) for treatment-resistant schizophrenia in 1989 (resulting in a...