Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.

NCT03585270 · ClinicalTrials.gov registry record · Phase 3

Clinical Research Study With Clazosentan to Evaluate Its Effects on Preventing Complications Due to the Narrowing of the Blood Vessels (Vasospasm) in the Brain, Caused by Bleeding Onto the Surface of the Brain

A Phase 3 study, sponsored by Idorsia Pharmaceuticals.

Completed
Registry status
Phase 3
Development phase
409
Enrollment target

NCT03585270: Completed Phase 3 study, sponsored by Idorsia Pharmaceuticals.

NCT03585270 is a Phase 3 study that has completed, run by Idorsia Pharmaceuticals. The registered enrollment target is 409 participants, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (47% lower). According to ClinicalTrials.gov, the official US trial registry.

View on ClinicalTrials.gov ↗

View your shortlist →

The verdict

NCT03585270, a Phase 3 study, has completed, sponsored by Idorsia Pharmaceuticals.

COMPLETED
Registry status
Phase 3
Development phase
409 participants
Enrollment target

Study Summary

This study will evaluate if clazosentan (on top of normal routine medical care) can reduce the risk of developing complications related to cerebral vasospasm and permanent brain damage as compared to normal routine medical care alone.

Primary Outcome

Clinical deterioration due to delayed cerebral ischemia is defined as a worsening of at least 2 points compared to the reference score, on the modified Glasgow Coma Scale or the abbreviated National Institutes of Health Stroke Scale (aNIHSS), lasting for at least 2 hours, which cannot be entirely attributed to causes other than cerebral vasospasm. It is centrally adjudicated by the Clinical Event Committee (CEC) based on a written charter and review of clinical data, case narratives, angiograms

Interventions

  • DRUG Placebo
  • DRUG Clazosentan

Trial Details

FieldValue
Enrollment Target 409 participants
Start Date 2019-02-03
Est. Completion 2022-11-18
Phase Phase 3
Idorsia Pharmaceuticals

34 total trials

What the finished NCT03585270 record still lists

NCT03585270 is an interventional study that assigns participants to a tested intervention. The registered 409 participants enrollment target is mid-sized for trials with a published cap, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (47% lower).

The record links to 0 conditions, and to 2 interventions - of which Placebo is the first listed.

NCT03585270 does not publish any study locations in the registry export this page uses.

Frequently Asked Questions

What is clinical trial NCT03585270 about?

NCT03585270 is a clinical study titled "Clinical Research Study With Clazosentan to Evaluate Its Effects on Preventing Complications Due to the Narrowing of the Blood Vessels (Vasospasm) in the Brain, Caused by Bleeding Onto the Surface of the Brain". This study will evaluate if clazosentan (on top of normal routine medical care) can reduce the risk of developing complications related to cerebral vasospasm and permanent brain damage as compared to normal routine medical care alone.

What is the current status of trial NCT03585270?

This trial is currently completed. It is a Phase 3 study. The enrollment target is 409 participants. The study started on 2019-02-03. Estimated completion is 2022-11-18.

What interventions are being tested in trial NCT03585270?

The interventions under investigation include: Placebo (DRUG), Clazosentan (DRUG).

Who is sponsoring clinical trial NCT03585270?

This trial is sponsored by Idorsia Pharmaceuticals, which has 34 total clinical trials registered on ClinicalTrials.gov.

How this trial's enrollment target compares

Where NCT03585270's enrollment target sits among peer trials

409 911th of 2000 higher than 1,090 of 2,000 other Phase 3 trials

participants (enrollment target), bucketed by value

Each bar is a band; taller bars hold more other Phase 3 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source ClinicalTrials.gov registry export · 2026-08-08

Nationwide trials with similar profiles

Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.

Similar enrollment target

  • NCT06717334 · 409 participants

    A Study of Lung Cancer Screening in People With Unexplained Weight Loss

  • NCT02043691 · 410 participants · NA

    Evaluation of the Cook Custom Aortic Endograft, the Zenith t-Branch Endovascular Graft, and Surgeon-Modified Endograft in Treating Aortic Pathologies

  • NCT03042975 · 410 participants

    Imaging Genetics of Laryngeal Dystonia

  • NCT05730036 · 410 participants · Phase 3

    A Trial to Learn How Well Linvoseltamab Works Compared to the Combination of Elotuzumab, Pomalidomide and Dexamethasone for Adult Participants With Relapsed/Refractory Multiple Myeloma

Similar registry start date

  • NCT05962346 · started 2026-12 · NA

    Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia

  • NCT07125183 · started 2026-12 · Phase 2

    Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma

  • NCT07292298 · started 2026-11 · Phase 2

    Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates

  • NCT04263285 · started 2026-10 · NA

    Treatment of Depression Post-SCI

Source: ClinicalTrials.gov NCT03585270, the US trial registry maintained by the National Library of Medicine. NCT03585270 (mid enrollment · none site footprint · completed) retrieved and formatted by PlainTrial, see methodology.