Journal
HUMAN PSYCHOPHARMACOLOGY-CLINICAL AND EXPERIMENTAL
Volume 17, Issue -, Pages S27-S32Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/hup.386
Keywords
antidepressants; onset of action; mirtazapine; SSRIs; depression
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Because the value of antidepressants is hampered by their delay in onset of action, considerable attention has been focused on developing a drug that acts more rapidly. However, although specific studies are now ongoing, there have been no peer-reviewed prospective onset of action trials published in the literature to date. Some data are currently available from post-hoc pooled analyses and numerous methods have been developed for evaluating the onset of action; these include the time to response, the time to onset of therapeutic effect, pattern analysis and survival analyses. Such an analysis of four large-scale, double-blind studies has provided evidence for an earlier onset of action with mirtazapine than with the SSRIs (fluoxetine, paroxetine and citalopram). Significant differences were seen between mirtazapine and the SSRIs after 1 week of treatment. This effect was consistent across the four different methodologies and appears to be due to a specific antidepressant effect rather than an early effect on, for example, sleep. These findings await confirmation from specifically designed prospective onset of action studies. Copyright (C) 2002 John Wiley Sons, Ltd.
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