# Effects of Switching From Racemic Methadone to R-methadone on QTc Intervals

> **NCT04254731** · PHASE4 · UNKNOWN · sponsor: **Oslo University Hospital** · enrollment: 10 (actual)

## Conditions studied

- Adverse Drug Effect
- Drug Effect
- Heart Arrhythmia

## Interventions

- **DRUG:** Same individuals treated with racemic methadone and switched to levomethadone (R-methadone)

## Key facts

- **NCT ID:** NCT04254731
- **Lead sponsor:** Oslo University Hospital
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2015-05-07
- **Primary completion:** 2018-06-27
- **Final completion:** 2024-07-30
- **Target enrollment:** 10 (ACTUAL)
- **Last updated:** 2024-04-03


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04254731

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04254731, "Effects of Switching From Racemic Methadone to R-methadone on QTc Intervals". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04254731. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*