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Effect of antidepressant switching between nortriptyline and escitalopram after a failed first antidepressant treatment among patients with major depressive disorder

  • Ole Köhler-Forsberg (a1), Erik Roj Larsen (a2), Henriette N. Buttenschøn (a3), Marcella Rietschel (a4), Joanna Hauser (a5), Daniel Souery (a6), Wolfgang Maier (a7), Anne Farmer (a8), Peter McGuffin (a8), Katherine J. Aitchison (a9), Rudolf Uher (a10) and Ole Mors (a11)...
Abstract
Background

For patients with major depressive disorder (MDD) experiencing side-effects or non-response to their first antidepressant, little is known regarding the effect of switching between a tricyclic antidepressant (TCA) and a selective serotonin reuptake inhibitor (SSRI).

Aims

To compare the switch between the TCA nortriptyline and the SSRI escitalopram.

Method

Among 811 adults with MDD treated with nortriptyline or escitalopram for up to 12 weeks, 108 individuals switched from nortriptyline to escitalopram or vice versa because of side-effects or non-response (trial registration: EudraCT No.2004-001723-38 (https://eudract.ema.europa.eu/) and ISRCTN No.03693000 (http://www.controlled-trials.com)). Patients were followed for up to 26 weeks after switching and response was measured with the Montgomery–Åsberg Depression Rating scale (MADRS). We performed adjusted mixed-effects linear regression models with full information maximum likelihood estimation reporting β-coefficients with 95% CIs.

Results

Switching antidepressants resulted in a significant decrease in MADRS scores. This was present for switchers from escitalopram to nortriptyline (n = 36, β = −0.38, 95% CI −0.51 to −0.25, P<0.001) and from nortriptyline to escitalopram (n = 72, β = −0.34, 95% CI −0.41 to −0.26, P<0.001). Both switching options resulted in significant improvement among individuals who switched because of non-response or side-effects. The results were supported by analyses on other rating scales and symptom dimensions.

Conclusions

These results suggest that switching from a TCA to an SSRI or vice versa after non-response or side-effects to the first antidepressant may be a viable approach to achieve response among patients with MDD.

Declarations of interest

K.J.A. holds an Alberta Centennial Addiction and Mental Health Research Chair, funded by the Government of Alberta. K.J.A. has been a member of various advisory boards, received consultancy fees and honoraria, and has received research grants from various companies including Johnson and Johnson Pharmaceuticals Research and Development and Bristol-Myers Squibb Pharmaceuticals Limited. D.S. has served on advisory boards for, and received unrestricted grants from, Lundbeck and AstraZeneca. A.F. and P.M. have received honoraria for participating in expert panels for Lundbeck and GlaxoSmithKline.

Copyright
Corresponding author
Correspondence: Ole Köhler-Forsberg, Psychosis Research Unit, Aarhus University Hospital, Risskov, Skovagervej 2, DK-8240 Risskov, Denmark. Email: karkoe@rm.dk
Footnotes
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These authors contributed equally to this work.

Footnotes
References
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Effect of antidepressant switching between nortriptyline and escitalopram after a failed first antidepressant treatment among patients with major depressive disorder

  • Ole Köhler-Forsberg (a1), Erik Roj Larsen (a2), Henriette N. Buttenschøn (a3), Marcella Rietschel (a4), Joanna Hauser (a5), Daniel Souery (a6), Wolfgang Maier (a7), Anne Farmer (a8), Peter McGuffin (a8), Katherine J. Aitchison (a9), Rudolf Uher (a10) and Ole Mors (a11)...
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