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Published Online:https://doi.org/10.1176/ajp.117.8.749

Piperacetazine, a new phenothiazine derivative of the piperidine series, was clinically evaluated in 75 recently admitted hospitalized psychiatric patients. It over-all effectiveness in the treatment of the acute psychiatric disorders studies appeared comparable to that of other commonly used phenothiazine derivatives. The incidence of extrapyramidal reactions was low.

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