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Increased rate of trazodone prescribing with bupropion and selective serotonin-reuptake inhibitors versus tricyclic antidepressants.

OBJECTIVE: To determine whether trazodone is prescribed significantly more often with selective serotonin-reuptake inhibitors (SSRIs) and bupropion than with tricyclic antidepressants (TCAs).

METHODS: A retrospective analysis of Iowa City Department of Veteran's Affairs prescription records from March 1, 1995, to March 1, 1998, was performed. Antidepressants prescribed only by psychiatrists were included. Concomitant use was defined as trazodone prescribed on the same date or up to 42 days after the fill date of the primary antidepressant.

STATISTICS: All comparisons used 2 x 2 chi 2 contingency table. Significance level was set at p < 0.05.

RESULTS: Significantly more patients were prescribed trazodone concurrently with bupropion and SSRI antidepressants than with TCAs. Trazodone was prescribed significantly more often for patients receiving an SSRI (p = 0.0001, chi 2 = 14.59) or bupropion (p = 0.0295, chi 2 = 4.74) than for patients receiving a TCA. There was no significant difference in trazodone use between the patients taking SSRIs or bupropion. The percent of patients that received an SSRI, bupropion, or a TCA in combination with trazodone was 27%, 23%, and 13%, respectively. Overall, 23.7% of patients received trazodone concomitantly with a primary antidepressant.

DISCUSSION: The effects of antidepressants on sleep and on sleep scores of depression rating scales are reviewed. The clinical implications of these findings are discussed. The literature addressing the effects of antidepressants on sleep and on sleep scores of depression rating scales is summarized. Although sleep studies suggest that SSRIs may not improve sleep as well as a TCA, clinical studies do not often support these findings. Several studies report that bupropion may not improve sleep parameters as well as doxepin or trazodone. The clinical implications of these findings are discussed.

CONCLUSIONS: We have demonstrated that our clinicians prescribe trazodone at a significantly higher rate with an SSRI or bupropion than with a TCA. The exact reason for this difference is not known. If trazodone is used during the first six weeks of an initial antidepressant treatment trial, it should be discontinued to determine whether the patient's sleep disturbance has responded to the primary antidepressant. More comparison studies among the newer antidepressants and between classes of antidepressants concerning their effects on sleep in the depressed patient need to be performed.

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