OCD Treatment: What Works
Obsessive-compulsive disorder (OCD) is a cycle of unwanted intrusive thoughts and the acts a person feels driven to perform to relieve them, taking up more than an hour a day or causing real distress.
Also called: Obsessive-Compulsive Disorder, Obsessive compulsive disorder.
ICD-10 F42 · ICD-11 6B20
Let the doubt stay. Leave the ritual undone.
The obvious way to deal with a doubt is to settle it. Check again. Wash again. Ask again. That is exactly what keeps OCD going.
The treatment with the best evidence asks for something that feels wrong. You face the doubt on purpose, and you do not do the ritual. The anxiety rises. Then, without the ritual, it falls anyway. Each time this happens the brain learns it can carry the doubt, and the urge gets weaker.
WHERE TREATMENT STARTS
Therapy with exposure first, medicine alongside if needed
NICE, the National Institute for Health and Care Excellence, is the body that writes the UK guidelines. It recommends cognitive behavioural therapy, or CBT, that includes exposure and response prevention, or ERP, as the main treatment. For milder OCD, it can start with guided self-help or a group.
For moderate OCD, the choice is ERP or an SSRI. For severe OCD, both are used together. For children and young people, ERP comes first.
Sometimes an SSRI has not helped after about twelve weeks at a proper dose. Then the next options are a different SSRI, a medicine called clomipramine, or combining the medicine with ERP.
THE EXERCISE THAT FEELS WRONG
Leave it.
The main treatment for OCD is called exposure and response prevention, or ERP. It works up a ladder of situations, easiest first, planned with a therapist. The example below is checking the front door.
On each step, the person locks the door once and walks away. Then the thought arrives. What if it is not locked? The urge to go back rises. The whole exercise is to let that urge rise and not go back.
You have two buttons here, and that is the point. One starts the wait. The other offers to check. Try both. Watch what each one does to the NEXT urge, not to this one.
Press Start, then watch the urge. The "Go back and check" button will light up. You are allowed to press it. See what happens either way.
Start
Go back and check
Urge to check
7
Lock once, walk to the end of the road
0.55
Lock once, drive to the shop
0.68
Lock once, go to work for the day
0.8
Lock once, go away for the weekend
0.92
0.34
0.66
0.08
Ready. Press Start when you are.
What if it is not locked? The urge is rising.
This is the peak. It feels urgent. Nothing actually needs doing.
Still not checked. The urge is easing on its own.
You left it. The urge came down without the ritual. The next one will be smaller.
It was locked. Relief, for now. The next urge will be stronger.
Step cleared. The urge barely rises here any more. On to the next step.
All four steps done. The doubt still comes. It no longer runs the day.
Compare the two buttons. Checking gave relief within seconds, and it made the next urge bigger. Leaving it alone was harder, and it made the next urge smaller. That is the whole of response prevention. The doubt is allowed to stay, and the brain learns it can carry it.
After locking the door once, the urge to check rises, peaks, and then falls on its own.
If the person checks, the urge drops at once. It comes back stronger next time.
If they leave it alone, the next urge on that step is smaller. Once it is small enough, they move up to a harder step.
Real ERP is planned with a trained therapist. It usually runs over 12 to 20 sessions, with practice in between. It covers mental rituals and asking for reassurance too, not only the visible rituals. This device shows you the idea. It is not a way to do the therapy alone.
THE OPTIONS
What else has evidence
ERP is the core treatment. These are the other tools, and what happens when the first steps are not enough.
SSRIs
Sertraline and fluoxetine are two of them. For OCD they are often given at higher doses than for depression, and for up to twelve weeks. They clearly help about half of people.
Clomipramine
This is an older medicine that also works strongly on serotonin. It is effective, but it has more side effects. So it is usually tried after SSRIs.
When those are not enough
Adding a low dose of an antipsychotic helps about a third of the people an SSRI did not help. For very severe OCD, specialist centres may offer intensive programmes. Rarely, they offer deep brain stimulation.
Why reassurance is part of the ritual
Family and friends often end up checking on someone's behalf. Or they answer the same question again and again. They do it out of love. Good treatment includes them, so that together they can gently stop feeding the loop.
IF YOU START ERP
What actually happens, in order
It is structured and gradual. Every step is agreed together.
First you map the OCD. That means naming the obsessions and every single ritual, including the invisible ones.
Then you learn how the loop works, and why relief keeps it running.
Then you build a ladder of situations, from slightly hard up to very hard.
Then you work up that ladder, in sessions and at home, dropping the rituals step by step.
Many people see real change within a few months. A plan for relapses is made before the therapy ends.
OVER TIME
How well it works
It works better than most people expect. It rarely works all at once.
In trials, CBT with ERP produces large reductions in symptoms. Those gains usually last.
SSRIs clearly help about half of people. Higher doses help a few more, and bring more side effects.
OCD usually becomes something a person manages, rather than something that disappears. Many people get their time and their life back.
COMING OFF
Slowly, with a plan
The medicine is usually continued for a good while after things improve.
Guidelines suggest continuing an SSRI for at least a year after the OCD improves. Stopping sooner raises the chance of relapse.
Stopping should be gradual, and done with a doctor, to avoid withdrawal symptoms.
The skills from ERP keep working after therapy ends. When the doubt flares up again, the same rule applies. Leave the ritual undone.