2015, Number 1
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Arch Neurocien 2015; 20 (1)
Olanzapine and fluoxetine combined as therapy for treatment-resistant depression: a systematic review
Tamayo JM, Pica-Ruiz Y, Ruiz I
Language: English
References: 52
Page: 3-19
PDF size: 192.14 Kb.
ABSTRACT
Objective: we conducted a systematic review to evaluate the evidence for the efficacy and safety of olanzapinefluoxetine
combined (OFC) in patients with treatment-resistant depression (TRD).
Material and methods: MEDLINE,
EMBASE, Cochrane Library, ClinicalTrials.gov, and LillyTrials.com were searched (28 February 2014) using terms
related to TRD and OFC (no language restrictions). All prospective studies of OFC treatment of TRD were included.
Results: we included 16 studies (5 meta-analyses, 3 pooled analyses, 7 randomized controlled trials [RCTs], 1
nonrandomized, open-label trial); unpublished data of open-label extensions were available for 4 RCTs. The definition
of TRD varied; most studies defined TRD as response failure after 2 antidepressant trials of≥4 weeks. All RCTs
compared OFC with fluoxetine. Treatment duration was 4 12 weeks in RCTs, and 8 76 weeks in open-label studies.
Depressive symptoms improved with OFC treatment in all studies; improvement was generally greater and occurred
earlier than with fluoxetine and was sustained during longer-term treatment. Response (27.5%-80%) and remission
(16.9%-73.3%) rates were generally greater than with fluoxetine. Weight gain and changes in metabolic parameters
were generally more common in patients treated with OFC than with fluoxetine. Other adverse events and
discontinuation rates were similar to those seen with fluoxetine.
Conclusions: evidence from prospective studies
supports the efficacy of OFC in the treatment of TRD, which is sustained with longer-term treatment. However,
there may be a greater risk of weight gain and changes in metabolic parameters. Physicians may consider OFC as
treatment for TRD, provided the risks of weight gain and metabolic changes are actively managed.
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