Completed PHASE4 INTERVENTIONAL 2-arm NCT01933542

The Effect of Chlorzoxazone on Moderate to Severe Postoperative Pain After Spine Surgery

Sponsor: Glostrup University Hospital, Copenhagen

Conditions Chlorzoxazone Postoperative Pain

Interventions Chlorzoxazone Morphine Placebo Zofran

Updated 7 times since 2017 Last updated: Sep 16, 2015 Started: Aug 31, 2013 Primary completion: Aug 31, 2015 Completion: Aug 31, 2015

This information is for research purposes only and is not medical advice. Consult a healthcare provider before making any medical decision.

This PHASE4 trial investigates Chlorzoxazone and Postoperative Pain and is currently completed. Glostrup University Hospital, Copenhagen leads this study, which shows 7 recorded versions since 2013 — indicating limited longitudinal coverage. The change history captured here reflects the iterative nature of clinical trial conduct.

Status Flow

Change History

7 versions recorded

Sep 2025 — Present [monthly]

Completed PHASE4
Sep 2024 — Sep 2025 [monthly]

Completed PHASE4
Jul 2024 — Sep 2024 [monthly]

Completed PHASE4
Jan 2021 — Jul 2024 [monthly]

Completed PHASE4
Jun 2018 — Jan 2021 [monthly]

Completed PHASE4

▶ Show 2 earlier versions

Feb 2017 — Jun 2018 [monthly]

Completed PHASE4
Jan 2017 — Feb 2017 [monthly]

Completed PHASE4

First recorded

Aug 2013

Trial started

Per CT.gov start date — pre-dates our first snapshot

Eligibility Summary

No eligibility information available.

Contact Information

Sponsor contact:

Glostrup University Hospital, Copenhagen
Rigshospitalet, Denmark

Data source: Rigshospitalet, Denmark

For direct contact, visit the study record on ClinicalTrials.gov .

Study Locations

• Glostrup Municipality, Denmark