[Night sleep study in chronic psychotics under long term flupenthixol treatment (author's transl)].

Ten chronic psychotics under long term Flupentixol treatment were recorded by series of 3 consecutive nights (8 h.). Only minor sleep organization disturbances were found: decrease of total sleep time (stages 1, 3, 4) and lengthening of sleep onset latency. Total REM duration remained close related to control one. However, intermediary phases were frequent and over 20 min. by night. The "first night effect" was to the second but only slow sleep was implicated.