Does EMDR Really Work? What the Evidence (and a Therapist) Actually Say

“Does this actually work?” It is one of the first things people ask me about EMDR, and it is a fair question. You may have read the clinical definition already. What you really want to know is whether it will do anything for you, or whether it is just hype.

I’m Masood Suliman, a Registered Psychotherapist and an EMDRIA Certified Therapist™ in Hintonburg, Ottawa, and EMDR is a large part of how I work with trauma and PTSD. Here is my honest answer: what the research shows, what I actually see change in the room, and, just as important, what EMDR cannot do. If you want the overview of how I offer it locally, you can also read my EMDR therapy in Ottawa page.

EMDR can help, but an individual outcome cannot be promised

EMDR is an evidence-based treatment option for adults with PTSD. That means research supports considering it; it does not mean it will help every person or that there is one condition that guarantees success. The research section below explains the recommendations and their limits.

In my practice, assessment includes how you respond to a memory and whether you can remain aware of the present while attending to it. I describe that aim as dual awareness: one foot in the memory and one foot in the room with me. If you become overwhelmed or disconnected, we pause and review the pace or approach. These responses inform the treatment plan; they do not determine your worth, effort or eventual outcome.

We also consider your preferences, current circumstances and other treatment options. Preparation may be part of that plan. If the work is not helping, we need to be able to discuss that and decide what to change.

I was skeptical too

If part of you is thinking this sounds like pseudoscience, how can someone waving their fingers in front of me fix my trauma, I understand completely. I was skeptical before I trained in it.

What changed my mind was experiencing it myself during training, and then watching it with clients. I saw severely distressing memories move from what people rate as a 10 out of 10, the worst it gets, down toward a 0, and I saw people start to genuinely believe good things about themselves that they could not access before. Healthy skepticism is reasonable. But it is hard to argue with both the research and what I have now seen many times in the room.

What the research actually shows

EMDR is not fringe. A few markers I trust:

• The World Health Organization’s 2023 guidance includes EMDR among the psychological treatments to consider for adults with PTSD. This is a conditional recommendation based on moderate-certainty evidence.
• The American Psychological Association’s 2025 guideline conditionally recommends EMDR as a second-line treatment for adults with PTSD. This supports considering EMDR while recognizing that some other PTSD treatments received stronger recommendations.
• Reviews of randomized trials support EMDR for reducing PTSD symptoms. Study results vary and cannot predict your outcome or how many sessions you will need.

Researchers are still studying how EMDR works. Small brain-imaging studies have reported changes after treatment, but these findings are preliminary. They do not establish what caused the changes or predict an individual person’s outcome.

What I actually see change in the room

Research is one thing. Here is what I witness, session to session, that tells me the work is doing something.

The first sign is the nervous system settling. When we begin and a client first brings the memory to mind, I can see the activation: the shoulders rise, there is some fidgeting, a shift in the seat, discomfort or fear or anxiety on the face. After we reprocess the memory and then open it back up, that activation is mostly gone. The memory is still there, but the body is no longer bracing against it.

I want to be clear about what that is and is not. We are not minimizing the trauma or pretending it wasn’t bad. People will still say “that was horrible.” What changes is the second half of the sentence: “that was horrible, and I am okay with it today.” We are not erasing the past. We are reprocessing it so it stops bothering you in the present.

The other changes show up a little later, in how people carry themselves. They start to believe in themselves a bit more. They set more boundaries. The positive belief we landed on in session, something like “I did nothing wrong” or “I have control now,” starts to feel true, replacing the belief the trauma had wired in. You can read more about how that unfolds in a single session in my piece on what actually happens in an EMDR session.

What EMDR cannot do

This matters as much as the rest, and you will not always hear it said plainly. EMDR is not going to fix everything. It is a tool, like other good therapies, for reprocessing traumatic memory.

What it can do is reprocess a past memory, shift the negative beliefs about yourself that got attached to it, and often change the present-day behaviours that grew out of that trauma. What it will not do is resolve every problem in your life, and, depending on your nervous system and the complexity of what you carry, it is usually not a one-session fix. EMDR takes the time it takes. Any therapist who promises a guaranteed outcome or a fixed timeline is overpromising.

Who EMDR helps quickly, and who needs groundwork first

Some people can begin EMDR almost right away. If you came through a single, contained event, a car accident that now makes driving feel unsafe, a mugging, a recent shock, EMDR can often move fairly directly. It can also help with grief, and with many experiences of abuse.

I am more careful with significant, complex childhood trauma. Going straight into processing can overwhelm a nervous system that was shaped by years of it, so with those clients I usually build stability first.

That said, not everyone with childhood trauma needs a long runway. Some people have already done other work and have a nervous system with more tolerance. What I assess is specific: can you tolerate the difficult feeling a memory brings, and can you also tolerate positive feeling, calm and peace, without dissociating most of the time? If both are workable, we can begin. If not, building that capacity is the first phase of the work, not a detour from it. My guide to complex PTSD treatment in Ottawa goes deeper into that pacing, and when a memory is too charged to approach head-on, I sometimes use the Flash Technique to lower the intensity first.

So how long until I feel better?

This is one of the most common questions I get, and the honest answer is that it depends. That is not what most people want to hear, but it is the reality.

Someone with a supportive history and little prior trauma, who comes in after a single recent incident like a car accident, may notice EMDR affecting their nervous system within the first session or two. Someone carrying years of complex trauma, abuse, or neglect will usually need longer, depending on their nervous system and tolerance. Neither pace is better or worse. They are just different starting points, and the work meets you where you are.

Questions people ask

Is EMDR scientifically proven? EMDR is an evidence-based option for adults with PTSD. WHO includes it among recommended options, and APA’s 2025 guideline gives it a conditional, second-line recommendation. That evidence does not guarantee an outcome for any individual, and research support differs for conditions other than PTSD.

Does EMDR work for everyone? No therapy works for everyone. EMDR works best when your nervous system can hold dual awareness. For complex trauma, we often build that capacity first.

Will EMDR erase my memory? EMDR is not intended to erase a memory. The aim is to reduce the distress and other difficulties connected to it. Whether and how that changes for you needs to be reviewed during treatment.

How many sessions will I need? For a single event it can be a handful. For complex trauma it is usually longer. I will give you an honest sense of this once I understand your history. For the full arc of treatment, see the 8 phases of EMDR.

Finding out if EMDR is right for you

You don’t have to decide whether EMDR is right for you before you reach out. That is what a first conversation is for. You can read about my broader approach to working with trauma and PTSD, learn more about EMDR therapy in Ottawa, or get in touch whenever you are ready.

If you are currently in crisis or thinking about harming yourself, please reach out for immediate support: call or text the National Suicide Crisis Helpline at 988 (24/7), the Distress Centre of Ottawa and Region at 613-238-3311, or 911 if you are in immediate danger.

This article is for informational purposes only and is not a substitute for professional mental health advice or therapy. Reading it does not create a therapist-client relationship.