OCD Treatment
Treatment-
Resistant OCD
By Justin La Rose, RP, M.Psy · Registered Psychotherapist (CRPO) · Clinical Director, The OCD Clinic
Evidence last reviewed: October 2026
Treatment-resistant OCD is OCD that hasn't improved enough after first-line treatment. When ERP doesn't work, the first step is to check it was really ERP, done well. After that, the next steps run in order: adjust or add medication, try a second-line therapy like ACT or I-CBT, step up to intensive treatment, and for severe OCD, consider TMS or deep brain stimulation.
If you're here, you've probably already done the hard thing once. Maybe twice. I want to be straight with you: not working the first time is common, and it's rarely the end of the road. It just means the plan needs to change.
The short answer
- Non-response is common: About 20% of people don't respond to ERP, and about half don't respond to their first SSRI (Abramowitz et al., 2026).
- Doing the practice matters: Following through on exposures and resisting rituals, especially in sessions five through nine, predicts better outcomes across multiple studies (Abramowitz et al., 2026).
- There are next steps: The IOCDF guidelines list second-line therapies, medication changes, and for severe treatment-resistant OCD, TMS and deep brain stimulation (IOCDF).
- Family involvement: Family members joining rituals or giving reassurance was linked with more severe OCD across 41 studies (Wu et al., 2016).
Was it actually ERP?
The first thing to check is whether you actually got ERP, because a lot of what gets called ERP isn't. I've seen it over and over: someone says ERP didn't work, and it turns out they talked about their fears for six months and never faced one. Ask yourself:
Were there exposures in session?
Not just talking about the fear: actually facing it, with your therapist there.
Was response prevention planned for the week?
Exposure without dropping the ritual is just a scary afternoon.
Were mental compulsions targeted?
Reviewing, checking your feelings, praying it away, arguing with the thought. These count.
Was the family still accommodating?
If a partner or parent keeps reassuring or taking over, the OCD keeps getting fed at home.
Was progress measured?
A score at the start and along the way, not just a feeling that it's going okay.
If the answer to most of these is no, you haven't failed ERP. You haven't had it yet.
What makes OCD harder to treat?
Research has linked poorer outcomes to more severe OCD, poor insight into how excessive the fears are, rigid thinking, other conditions alongside OCD such as depression or OCPD, a history of poor treatment outcomes, and family over-involvement in rituals. The BMJ review notes these effects are small and not all have been replicated (Abramowitz et al., 2026). They don't mean treatment won't work. They tell you where the plan needs extra attention.
What are the next steps after ERP?
- Better ERP. Harder exposures, more varied settings, mental rituals targeted, and family brought in to stop accommodating. Often this is the real fix.
- Medication changes. A higher SSRI dose, a different SSRI, clomipramine, or an added medication. Those are decisions for your doctor or psychiatrist.
- Second-line therapies. ACT, cognitive therapy, inference-based CBT (I-CBT) or metacognitive therapy. The review notes the I-CBT research has mostly come from the people who developed it.
- Intensive treatment. More hours of ERP per week, in a day or residential program.
- Brain stimulation. TMS, and for the most severe cases deep brain stimulation, as third-line options.
The newer options get their own comparison on TMS vs ketamine vs psilocybin for OCD. For where to find intensive care in Ontario, see the Ontario OCD treatment guide.
Where should you start?
Start by getting a second opinion from someone who does ERP every day. Bring what you tried, for how long and what happened. Often the answer is a better-built version of the same treatment, not a different one. That's what our OCD treatment in Toronto starts with, and the whole ladder is on OCD treatment in 2026: what works.
FAQ
What Do People Ask When ERP Didn't Work?
There isn't one agreed definition. In practice it usually means OCD that hasn't improved enough after an adequate course of ERP and at least one adequate medication trial. Adequate is the important word: the dose, the length and the quality of the treatment all count.
No. Research ties poorer outcomes to things like severity, poor insight, other conditions alongside OCD and family over-involvement, not to effort alone. It does mean the plan needs to change, not that you stop.
If weekly outpatient ERP hasn't been enough, intensive programs are a recognized next step. ERP is effective in intensive settings too, according to the IOCDF. In Ontario, the Ontario OCD treatment guide lists the options and their referral rules.
Only inside research for now. The IOCDF lists them as experimental and advises against psychedelic use as treatment outside controlled research settings.
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Book Free ConsultationHow we researched this page
This page draws on a 2026 state-of-the-art review in the BMJ (Abramowitz et al., 2026), the International OCD Foundation's treatment guide read in October 2026, and a meta-analysis of family accommodation (Wu et al., 2016), alongside what I see in my own practice. There is no single agreed definition of treatment-resistant OCD, predictors of poor response have small effects, and research on second- and third-line options is thinner than for first-line ERP and SSRIs.
A note on my perspective
I run a private clinic that treats OCD with ERP, and I'm paid when people book with us. Read what I write with that in mind. Public and lower-cost routes exist too, and the Ontario OCD treatment guide lays them out next to ours.
About the author
Justin La Rose, RP, M.Psy is a Registered Psychotherapist with the College of Registered Psychotherapists of Ontario (CRPO) and Clinical Director of The OCD Clinic in Toronto. He has worked in mental health for more than 25 years and treats OCD with Exposure and Response Prevention (ERP). You can confirm his registration on the CRPO public register.
Client stories on this site are composites, with names and identifying details changed. How we write client stories
How to cite this page
La Rose, J. (2026). Treatment-Resistant OCD: What to Try When ERP Doesn't Work. The OCD Clinic. https://theocdclinic.ca/ocd-treatment/treatment-resistant-ocd