# A patient with severe contamination obsessive-compulsive disorder is starting exposure and response prevention (ERP) therapy. Which patient statement indicates correct understanding of how ERP works?

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> language: en  
> subject: NCLEX-RN  
> category: PSI

## Question

A patient with severe contamination obsessive-compulsive disorder is starting exposure and response prevention (ERP) therapy. Which patient statement indicates correct understanding of how ERP works?

## Option

1. "ERP will replace my obsessive thoughts with positive ones so I no longer feel the urge to wash my hands."
2. "During ERP my anxiety will rise sharply at first, but if I stay with the exposure without washing, the anxiety will gradually come down on its own." **✔ Correct answer**
3. "I will take a higher dose of antianxiety medication immediately before each ERP session so the exposure is comfortable."
4. "ERP works best when I avoid all contamination triggers between sessions to keep my anxiety stable."

**Correct answer: 2**

## Explanation

ERP exposes the patient to the obsessional trigger and prevents the compulsive response. The patient learns through HABITUATION that anxiety naturally decreases on its own without performing the compulsion. Statement 1 (replacing thoughts) is not how ERP works — it is acceptance + non-engagement, not thought replacement. Statement 3 (medication to dampen anxiety) UNDERMINES exposure because the patient never learns the anxiety self-resolves. Statement 4 (avoid all triggers) is the opposite of ERP — between-session avoidance prevents generalization.

## In-depth explanation

The therapeutic mechanism of ERP is the anxiety habituation curve: anxiety spikes during exposure, peaks within 30-60 minutes, and falls naturally if the compulsion is not performed. Each repeat exposure produces a faster, lower curve. Anything that short-circuits the curve (PRN benzo, mental rituals, reassurance-seeking) blocks therapy progress.

## Clinical scenario

Adult patient with **severe contamination OCD** performs hand washing 50+ times daily. **ERP therapy** begins with the therapist instructing the patient to touch a doorknob and then refrain from washing. The nurse reinforces ERP teaching.

## Key concepts

- **ERP (Exposure and Response Prevention)** — First-line evidence-based CBT for OCD; deliberate exposure to triggers while preventing the compulsive response.
- **Anxiety habituation curve** — Anxiety naturally rises and falls during exposure if the compulsion is not performed; the falling phase is therapeutic.
- **Reassurance-seeking** — Compulsive behavior in OCD that interferes with ERP; nurses learn to gently redirect rather than reassure.

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