Exposure and Response Prevention (ERP)

Reviewed by the HeyPsych Medical Review Board

Board-certified psychiatrists and mental health professionals

Published September 2, 2026•Updated September 2, 2026•Reviewed September 2, 2026

Indications

Primary Indications

Obsessive-Compulsive DisorderBody Dysmorphic DisorderGeneralized Anxiety DisorderSpecific PhobiasBinge Eating Disorder

Mechanism

ERP is based on the principle of habituation and inhibitory learning. By repeatedly confronting feared stimuli without performing compulsions, individuals learn that anxiety diminishes on its own and that feared outcomes are unlikely. Over time, this weakens the association between obsessive thoughts and compulsive rituals, reducing symptom severity.

Protocol

Preparation

Assessment of obsessions, compulsions, and avoidance behaviors; development of a fear hierarchy.

Procedure

Gradual exposure to feared thoughts, images, or situations (imaginal and/or in vivo).
Prevention of compulsive responses (ritual blocking).
Therapist support, modeling, and reinforcement of non-ritualizing behavior.
Homework assignments for daily practice.

Frequency: Typically weekly sessions; intensive programs may meet multiple times per week.

Duration: 12–20 sessions for standard course, though severe OCD may require longer.

Session Structure

Pre-Session

Review homework and anxiety triggers.

Treatment Phase

Engage in structured exposure tasks while preventing rituals.

Post-Session

Process experience, assign new exposures, reinforce learning.

Expected Outcomes

Immediate

Increased anxiety during exposure
Insight into compulsive patterns

Short Term

Reduction in ritual frequency
Improved tolerance of distress

Long Term

Significant reduction in OCD severity
Improved daily functioning

Side Effects

common

Temporary anxiety or distress

uncommon

Dropout due to difficulty tolerating exposures

rare

Exacerbation of symptoms if not properly supported

Contraindications

absolute

Unstable psychosis
Severe suicidality

relative

Lack of engagement or support system
Severe cognitive limitations

Patient Selection

ideal candidates

Individuals with OCD willing to confront feared thoughts and situations
Patients motivated for behavioral change
Clients with access to therapist support or strong support systems

screening required

Clinical interview
Assessment scales (e.g., Yale-Brown Obsessive-Compulsive Scale, Y-BOCS)

Training Requirements

practitioner

Licensed therapists trained in ERP or CBT for OCD

facility

Private practice, outpatient clinics, intensive treatment programs

Research Evidence

Key Studies

Foa EB, Kozak MJ. (1986). Emotional processing of fear: exposure to corrective information.
Simpson HB, et al. (2008). Randomized controlled trial of ERP vs risperidone augmentation for refractory OCD.

Limitations

Some patients refuse or drop out due to difficulty tolerating exposure-related anxiety.

Cost Considerations

typical session cost: $120–$200

total treatment cost: Varies based on session length and frequency (commonly $2,000–$5,000 per course)

insurance coverage: Usually covered under psychotherapy benefits

cost effectiveness: High—often prevents need for long-term medication or hospitalization

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Integration Support

Concurrent Therapies

SSRIs for OCD symptom management
CBT for co-occurring depression or anxiety
Family therapy for support and accommodation reduction

Special Populations

Clinical Notes

Considered the gold standard for OCD.
Requires high therapist expertise and patient motivation.
Exposure tasks must be collaboratively tailored to patient’s hierarchy.

This treatment information is for educational purposes only. Treatment decisions should be made in consultation with qualified healthcare professionals based on individual circumstances, symptoms, and medical history. Do not attempt treatment without professional guidance.

Interested in this treatment?

This information is for educational purposes. Always consult with a qualified healthcare provider before starting any new treatment.

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