Eye Movement Desensitization and Reprocessing (EMDR) has been studied extensively as a treatment for Post-Traumatic Stress Disorder (PTSD).
Since depression often occurs alongside PTSD, researchers have also investigated whether depressive symptoms change when people receive EMDR for trauma-related difficulties.
Studies have examined depression before and after treatment, compared EMDR with other approaches, and followed participants to see whether improvements continue.
Overall, findings frequently show reductions in depressive symptoms alongside improvements in PTSD.
However, many studies measured depression as an additional outcome rather than focusing exclusively on people diagnosed with both conditions.
That distinction matters: evidence that depression scores improved during PTSD treatment is valuable, but it is not identical to evidence that a separate depressive disorder was successfully treated.
Why Are PTSD and Depression Studied Together?
PTSD and depression are distinct conditions, yet they can affect similar aspects of life. PTSD may involve unwanted memories, avoidance of reminders, and changes in mood or beliefs.
Depression may involve persistent low mood, less interest in enjoyable activities, reduced energy, or problems concentrating.
When these conditions occur together, some symptoms overlap. A person receiving treatment for PTSD may also notice difficulties with sleep, motivation, or enjoyment that are reflected on a depression questionnaire.
Researchers therefore measure both sets of symptoms to understand whether changes extend beyond trauma-related distress.
Measuring depression separately also prevents an important assumption: that improvement in PTSD automatically produces improvement in depression. Some participants improve in both areas, while others may experience different patterns of change.
How Do Researchers Measure Depression?
EMDR trials frequently use standardized depression questionnaires or clinician ratings. These have included the Beck Depression Inventory, Hamilton Depression Rating Scale, and Patient Health Questionnaire-9.
Participants may complete a measure before treatment, immediately afterward, and sometimes at a later follow-up.
A lower score can indicate that depressive symptoms have become less frequent or less intense. But a questionnaire score is not necessarily the same as a formal diagnosis.
Someone may report depressive symptoms without meeting the criteria for major depressive disorder, while another participant may have a diagnosed condition.
This is why descriptions such as "depressive symptoms improved" are often more accurate than saying that a study showed recovery from depression. The strongest interpretation depends on exactly whom the researchers enrolled and which outcomes they measured.
What Has an Individual Clinical Trial Shown?
A 2007 randomized trial by van der Kolk and colleagues compared EMDR, the antidepressant fluoxetine, and a pill placebo in 88 adults with PTSD. Participants were assessed after eight weeks of treatment and again six months later.
Alongside PTSD symptoms, researchers measured depression using the Beck Depression Inventory-II.
The trial reported sustained reductions in PTSD and depressive symptoms following EMDR, with the clearest benefits among participants whose traumatic experiences began in adulthood. Results were less favorable for the group with childhood-onset trauma.
This example shows why research often considers more than average improvement. A treatment can be associated with meaningful changes overall while outcomes still differ between groups of participants.
It also demonstrates the value of following people beyond the end of treatment to better understand whether reported gains continue.
What Have Meta-Analyses Found?
A meta-analysis combines results from multiple studies, allowing researchers to look for patterns that may be difficult to see in one trial.
A 2014 meta-analysis by Chen and colleagues reviewed 26 randomized controlled trials of EMDR for PTSD. Twenty included depression outcomes.
When the results were combined, EMDR was associated with a statistically significant reduction in depressive symptoms. The estimated effect size was approximately 0.64 in magnitude, indicating an average benefit across the included comparisons.
A 2023 meta-analysis by Rasines-Laudes and Serrano-Pintado examined 18 studies involving 1,213 participants. It also found improvements in depression alongside PTSD and anxiety symptoms, although the pooled effects were generally small. Its authors noted limitations in the methods and quality of some studies.
Together, these reviews suggest that improvements in depressive symptoms are a recurring finding in EMDR research, rather than a result reported by only one or two studies. They do not mean that all participants experience the same benefit.
What Did the 2026 Research Review Add?
A 2026 meta-analysis published in BMC Psychology brought together 65 randomized controlled trials involving 3,342 adults with PTSD. It investigated both immediate and follow-up outcomes, including depression.
For depressive symptoms, 38 comparisons contributed post-treatment data. The pooled effect favored EMDR, with a standardized effect size known as Hedges' g of 0.54. At follow-up, 11 comparisons also favored EMDR, with an estimated effect of 0.58.
An effect size summarizes the average difference between groups using a common statistical scale. It is not the percentage of participants who improved. Both results suggest favorable depression outcomes, although the smaller follow-up sample makes longer-term conclusions less certain.
The researchers also found considerable variation between studies. Differences in participants, comparison treatments, and study designs can influence the size of the reported effects.
That variation is one reason pooled findings are more informative when interpreted alongside the limitations of the included trials.
How Does EMDR Compare With Other Treatments?
One major research question is whether EMDR performs differently from other approaches. A waiting-list comparison answers a different question from a trial that compares two active treatments.
In the 2026 review, EMDR showed larger average benefits for depressive symptoms when compared with waiting lists or treatment as usual. The advantages were smaller when EMDR was compared with Cognitive Behavioral Therapy (CBT) or another active psychological intervention.
In comparisons directly involving CBT, researchers did not consistently find a statistically significant advantage for EMDR on depression outcomes.
A 2022 review of EMDR and CBT for PTSD likewise found no significant differences in depression outcomes at three- or six-month follow-up, even though some immediate results favored EMDR.
These results do not show that EMDR fails to help depressive symptoms. They indicate that improvement during EMDR and superiority over another effective treatment are separate claims. Research supports examining both questions rather than treating them as interchangeable.
Have Studies Included People Diagnosed With Both Conditions?
Yes. Some researchers have recruited participants who have PTSD and a separate diagnosis of major depressive disorder, allowing them to examine diagnostic outcomes rather than only questionnaire scores.
A 2023 study of intensive trauma-focused treatment involved 334 adults with PTSD, including 189 who also had major depressive disorder. The program combined EMDR with prolonged exposure therapy, physical activity, and psychoeducation.
Researchers reported reductions in depressive symptoms and a decline in the proportion of participants meeting the diagnostic criteria for major depressive disorder at follow-up. Approximately 57% met those criteria before treatment, compared with 33% at the six-month follow-up.
These are useful findings for understanding outcomes when PTSD and depression occur together. However, because the program included several interventions, it is not possible to attribute the depression improvements to EMDR alone.
The research demonstrates the importance of examining the complete treatment design before drawing conclusions.
Are Improvements Maintained After Treatment?
Researchers sometimes assess participants weeks or months after treatment to see whether changes are still present. These follow-up measurements are important because improvement at the final session does not, by itself, establish what will happen later.
The 2026 meta-analysis found favorable pooled depression outcomes at follow-up, suggesting that improvements may continue beyond the immediate treatment period. Earlier studies also reported benefits after treatment ended.
Still, follow-up evidence is less extensive than immediate post-treatment evidence. Studies use different intervals, and some have relatively small samples. Researchers therefore cannot identify one predictable timeline for everyone with PTSD and depression.
A more accurate conclusion is that sustained improvement has been observed, while longer and more consistent follow-up studies would make those findings easier to interpret.
What Has Research Not Yet Established?
Several questions remain. Researchers are still investigating whether changes in PTSD directly explain changes in depression or whether both respond to multiple influences.
Improving trauma-related distress may be associated with better mood, but two symptoms improving together does not prove that one change caused the other.
Studies also differ in trauma histories, symptom severity, session numbers, and depression measures. Many trials were designed primarily to evaluate PTSD, which means detailed depression-specific analyses were not always possible.
Another distinction concerns studies of EMDR for depression itself. That separate research asks whether EMDR can reduce depression when depression is the primary treatment target. It should not be confused with studies measuring depressive symptoms as a secondary outcome of PTSD treatment.
Future research can help clarify which participants experience improvements in both conditions, how those changes are related, and how reliably benefits persist over time.
What Does the Research Tell Us Overall?
Depression has been an important outcome in EMDR research involving people with PTSD. Across randomized trials and meta-analyses, depressive symptoms have often improved alongside PTSD symptoms. Some research also suggests that these improvements can remain evident at follow-up.
The strongest conclusions remain appropriately specific. Many studies measured symptoms rather than recovery from a separate depression diagnosis, and EMDR's advantage was usually smaller when compared with another active psychological treatment rather than a waiting list.
Overall, the evidence supports EMDR as a well-studied PTSD treatment that is frequently associated with improvements in depressive symptoms. Continued studies of people with both diagnosed conditions will make the picture clearer.
