Trifluoperazine (“Stelazine”) a Controlled Clinical Trial in Chronic Schizophrenia

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Abstract
So many new compounds are now being introduced for the treatment of psychiatric disorders that it is difficult for the clinician to assess the accuracy of the claims made for them. If a form of therapy is one hundred per cent. effective in a disease which was previously one hundred per cent. fatal, for example vitamin B12 in pernicious anaemia, the question of a controlled trial does not arise. But even the manufacturers do not claim such a degree of effectiveness for drugs advocated for the treatment of mental illnesses, and in addition the natural course of such illnesses is very variable, so that it is essential that clinical trials of these drugs should be controlled. Foulds (1958) has reviewed British and American clinical trials of drugs in psychiatry during the years 1951 to 1956, and has shown that the less controlled a trial, the more likely it is to result in a favourable report on the drug being tested, presumably because of bias on the part of the clinician. Forrester (1958), however, on the basis of a completely uncontrolled trial of Stelazine on only twenty-five patients, concluded that “the amount of improvement in a few cases was not sufficient to encourage the further use of the drug”.