Strategic use of new generation antidepressants for depression: SUN(^_^)D study protocol

Toshi A Furukawa, Tatsuo Akechi, Shinji Shimodera, Mitsuhiko Yamada, Kazuhira Miki, Norio Watanabe, Masatoshi Inagaki, Naohiro Yonemoto, Toshi A Furukawa, Tatsuo Akechi, Shinji Shimodera, Mitsuhiko Yamada, Kazuhira Miki, Norio Watanabe, Masatoshi Inagaki, Naohiro Yonemoto

Abstract

Background: After more than half a century of modern psychopharmacology, with billions of dollars spent on antidepressants annually world-wide, we lack good evidence to guide our everyday decisions in conducting antidepressant treatment of patients with major depression. First we did not know which antidepressant to use as first line treatment. Second we do not know which dosage we should be aiming at with that antidepressant. Because more than half of the patients with major depression starting treatment do not remit after adequate trial with the first agent, they will need a second line treatment. Dose escalation, augmentation and switching are the three often recommended second line strategies but we do not know which is better than the others. Moreover, we do not know when to start considering this second line treatment.The recently published multiple-treatments meta-analysis of 12 new generation antidepressants has provided some partial answers to the first question. Starting with these findings, this proposed trial aims to establish the optimum 1st line and 2nd line antidepressant treatment strategy among adult patients with a non-psychotic unipolar major depressive episode.

Methods: SUN(^_^)D, the Strategic Use of New generation antidepressants for Depression, is an assessor-blinded, parallel-group, multi-centre randomised controlled trial. Step I is a cluster-randomised trial comparing titration up to the minimum vs maximum of the recommended dose range among patients starting with sertraline. The primary outcome is the change in the Patient Health Questionnaire (PHQ)-9 scores administered by a blinded rater via telephone at week 1 through 3. Step II is an individually randomised trial comparing staying on sertraline, augmentation of sertraline with mirtazapine, and switching to mirtazapine among patients who have not remitted on the first line treatment by week 3. The primary outcome is the change in the PHQ-9 scores at week 4 through 9. Step III represents a continuation phase to Steps I and II and aims to establish longer-term effectiveness and acceptability of the above-examined treatment strategies up to week 25. The trial is supported by the Grant-in-Aid by the Ministry of Health, Labour and Welfare, Japan.

Discussion: SUN(^_^)D promises to be a pragmatic large trial to answer important clinical questions that every clinician treating patients with major depression faces in his/her daily practices concerning its first- and second-line treatments.

Trial registration: ClinicalTrials.gov: NCT01109693.

Figures

Figure 1
Figure 1
Flow diagram of the trial
Figure 2
Figure 2
Schedule of the planned assessments for Steps I, II and III
Figure 3
Figure 3
Organizational structure for the pilot study

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