Previous studies have noted that a considerable proportion of suicidal behavior is impulsive. The present study aimed to ascertain the degree to which this was so and to consider whether impulsive attempters differed from nonimpulsive attempters on variables such as demographic and motivational factors and cireumstances that surrounded the occurrence of the act. Based on a criterion of less than 5 minutes' premeditation, 40% of two large, consecutive series were judged to have acted impulsively. While few variables differentiated between the two groups, impulsive attempters were less depressed, motivated by the desire to reduce tension, more likely to consider that they would survive, and to report that someone saw them perform the act.

1 Nine volunteer poor sleepers, of mean age 61 years, took trazodone 150 mg nightly for 3 weeks, preceded by 2 weeks and followed by 1 week of matching blanks, in order to examine the effects of electrophysiologically-recorded and subjectively-rated sleep. The second of the initial weeks of matching blanks served as a baseline week. 2 In the subjective ratings, sleep improved in quality on trazodone, significantly so in the first and second weeks of intake, though with significant rebound insomnia on the second withdrawal night. 3 Trazodone halved the frequency of arousals interrupting sleep, and it reduced the time spent in stage 1 (drowsiness). It increased the duration of slow-wave sleep (stages 3 + 4), with a negative rebound following withdrawal. It reduced the time spent in REM sleep, with a rebound above baseline levels after withdrawal. 4 Trazodone did not change total sleep duration, nor the time required to fall asleep. 5 The effects of trazodone were sustained or became enhanced during the period of intake. They persisted for over 24 h after the last dose, and rebound effects were maximal on the second withdrawal night.

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