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Publication Detail
A randomised controlled trial assessing the use of citalopram, sertraline, fluoxetine and mirtazapine in preventing relapse in primary care patients who are taking long-term maintenance antidepressants (ANTLER: ANTidepressants to prevent reLapse in dEpRession): study protocol for a randomised controlled trial
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Duffy L, Bacon F, Clarke CS, Donkor Y, Freemantle N, Gilbody S, Hunter R, Kendrick T, Kessler D, King M, Lanham P, Lewis G, Mangin D, Marston L, Moore M, Nazareth I, Wiles N, Lewis G
  • Publication date:
    01/12/2019
  • Pagination:
    319
  • Journal:
    Trials
  • Volume:
    20
  • Issue:
    1
  • Status:
    Published
  • Country:
    England
  • PII:
    10.1186/s13063-019-3390-8
  • Language:
    eng
  • Keywords:
    Antidepressants, Citalopram, Depression, Fluoxetine, Mirtazapine, Primary care, Selective serotonin reuptake inhibitors, Sertraline
Abstract
BACKGROUND: Antidepressants are used both for treating acute episodes and for prophylaxis to prevent future episodes of depression, also called maintenance treatment. This article describes the protocol for a randomised controlled trial (ANTLER: ANTidepressants to prevent reLapse in dEpRession) to investigate the clinical effectiveness and cost-effectiveness in UK primary care of continuing on long-term maintenance antidepressants compared with a placebo in preventing relapse of depression in those who have taken antidepressants for more than 9 months and who are currently well enough to consider stopping maintenance treatment. METHODS/DESIGN: The ANTLER trial is an individually randomised, double-blind, placebo-controlled trial in which participants are randomised to remain on active medication or to take an identical placebo after a tapering period of 2 months. Eligible participants are those who: are between the ages of 18 and 74 years; have had at least two episodes of depression; and have been taking antidepressants for 9 months or more and are currently taking citalopram 20 mg, sertraline 100 mg, fluoxetine 20 mg or mirtazapine 30 mg but are well enough to consider stopping their medication. The participants will be followed up at 6, 12, 26, 39 and 52 weeks. The primary outcome will be the time in weeks to the beginning of the first episode of depression after randomisation. This will be measured using a retrospective version of the Clinical Interview Schedule-Revised administered at 12, 26, 39 and 52 weeks. Secondary outcomes will include depressive and anxiety symptoms, adverse effects, withdrawal symptoms, emotional processing tasks, quality of life and the resources and costs used. We will also perform a cost-effectiveness analysis based on results of the trial. DISCUSSION: The ANTLER trial findings will inform primary care prescribing practice by providing a valid and generalisable estimate of the clinical effectiveness and cost-effectiveness of long-term maintenance treatment with antidepressants in UK primary care. TRIAL REGISTRATION: Controlled Trials ISRCTN Registry, ISRCTN15969819. Registered on 21 September 2015.
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