RT Journal A1 HANLON TE, OTA KY, LIVCHITZ C, KURLAND AA T1 CHlorpromazine, triflupromazine, and prochlorperazine in chronic psychosis JF A.M.A. Archives of General Psychiatry JO A.M.A. Archives of General Psychiatry YR 1959 FD August 1 VO 1 IS 2 SP 223 OP 227 DO 10.1001/archpsyc.1959.03590020119011 UL http://dx.doi.org/10.1001/archpsyc.1959.03590020119011 AB As further phenothiazine tranquilizers become available in the treatment of the psychoses, there is an increasing need for comparative studies regarding their relative efficacy. A review of the literature indicates that such studies are now available on chlorpromazine and mepazine,1,2 promazine and mepazine,3 and promazine and chlorpromazine.4 In a previous paper by us, the effects of chlorpromazine and triflupromazine were compared in the management of the chronic, hospitalized psychotic patient.5 The following study is a continuation of the previous one, utilizing the same population and adding prochlorperazine as a final treatment phase. In this present paper the main emphasis will be on the comparative effectiveness of triflupromazine and prochlorperazine with original treatment with chlorpromazine serving as a base line. As previously, effectiveness is measured in terms of certain psychological dimensions observable in ward and interview behavior.Procedure  The subjects originally selected