The authors discuss the historical aspects, as well as the various etiological
and clinical factors which contribute to the so-called pharmacogenically induced depressions
during treatment by means of neuroleptics generally, and long-term neuroleptics especially.
An open study on 161 schizophrenic patients treated by means of fluspirilene and 123
patients treated by means of penfluridol is described. A single blind trial on 48 patients, by
means of fluphenazine-decanoate and flupenthixol-decanoate, which compares the possible
depression-inducing or antidepressant activity of the above drugs, is presented. The criteria
for evaluating drug-induced depressions and their two clinical types are discussed.
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