Initial improvement as predictor of outcome of neuroleptic treatment.

Improvement of acute psychotic exacerbations under neuroleptic therapy can depend on the time course of the disease itself, on the individual patient or on the specific neuroleptic applied. Previous studies demonstrated that neither the characteristics of the patients nor the disease qualities could predict the outcome of neuroleptic therapy (review by May and Goldberg 1978). In this study the initial improvement after the onset of neuroleptic treatment was tested for its predictive value. In 33 patients treated with constant doses of butyrophenones the decrease of psychotic symptomatology during the first 5 days of treatment not only accounted for the major part of the overall improvement, but was also a relatively reliable predictor for the further course of the therapy.