# The Effect of Chronic Pain on Delay Discounting in Methadone Patients

> **NCT04473950** · PHASE1 · TERMINATED · sponsor: **University of California, San Francisco** · enrollment: 10 (actual)

## Conditions studied

- Opioid-use Disorder
- Chronic Pain Syndrome

## Interventions

- **DRUG:** Naloxone Hydrochloride
- **DRUG:** Placebo

## Key facts

- **NCT ID:** NCT04473950
- **Lead sponsor:** University of California, San Francisco
- **Sponsor class:** OTHER
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** TERMINATED
- **Start date:** 2020-01-08
- **Primary completion:** 2022-10-06
- **Final completion:** 2022-10-06
- **Target enrollment:** 10 (ACTUAL)
- **Why stopped:** The COVID-19 Pandemic prevented us from meeting target goals.
- **Last updated:** 2025-03-26

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04473950

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04473950, "The Effect of Chronic Pain on Delay Discounting in Methadone Patients". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT04473950. Licensed CC0.

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