Skip to main content
OpenTrials
Not Yet Recruiting

NCT Number: NCT06396858

Anti-inflammatory and Anti-thrombotic Therapy With colcHicine and Low Dose Rivaroxaban for Major Adverse Cardiovascular Events Reduction in Ischemic Stroke

The ARCHIMEDES study (Anti-inflammatory and anti-thRombotic therapy with colCHicine and low dose rIvaroxaban for Major adverse cardiovascular Events reDuction in ischEmic Stroke) will be a randomized, double-blind, 2x2 factorial clinical trial, which will include at least 3000 and up to a maximum of 4500 patients with ischemic stroke without indication of oral anticoagulation.

Not Yet Recruiting

Trial opening soon.

Get Notified

Key information

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

About this study

In patients with ischemic stroke, within 14 days of symptom onset, to establish the efficacy and safety of two strategies in parallel: low-dose rivaroxaban and low-dose colchicine, compared with placebo.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients with acute ischemic stroke aged ≥18 years old who, regardless of etiology and mechanism, do not have a definitive indication for anticoagulation, and whose symptoms onset has been within the last 14 days;
  • Receiving standard therapy for acute management of ischemic stroke;
  • For patients treated with fibrinolytics, a minimum period of 24 hours after the infusion of the lytic drug is required for randomization into the study.

Exclusion criteria

  • Modified Rankin score of 4 or more at randomization;
  • Refusal to provide consent;
  • Severe renal failure, with glomerular filtration rate (by CKD-EPI) estimated at <15 mL/min/1.73 m2;
  • Severe liver failure (child C);
  • Indication for full-dose anticoagulation (for example, venous thromboembolism or atrial fibrillation);
  • Previous hemorrhagic stroke or history of intracranial hemorrhage;
  • Systemic treatment with a potent CYP 3A4 inhibitor (such as azole antifungals and protease inhibitors), or with a potent 3A4 inducer (such as rifampicin, phenytoin, phenobarbital, or carbamazepine);
  • History of inflammatory bowel disease or chronic diarrhea;
  • Prolonged treatment (> 1 month) with immunosuppressants or systemic corticosteroids;
  • History of recurrent pneumonia (3 or more hospitalizations in the last 12 months);
  • Pregnancy or breastfeeding;
  • Any other comorbidity other than stroke and CV disease (e.g., metastatic cancer) that, in the investigator's opinion, has a significant impact on the 12-month survival.

Treatment and study plan

Rivaroxaban 2.5 Mg Oral Tablet

Drug

Patients will receive one tablet, per oral or orogastric route, twice a day, for a maximum of 12 months.

Other names: Xarelto

Colchicine 0.5 MG

Drug

Patients will receive one tablet, per oral or orogastric route, once a day, for a maximum of 12 months.

Other names: Colchis

Placebo Rivaroxaban

Drug

Patients will receive one tablet, per oral or orogastric route, twice a day, for a maximum of 12 months.

Placebo Colchicine

Drug

Patients will receive one tablet, per oral or orogastric route, once a day, for a maximum of 12 months.

Primary outcomes

  1. Primary efficacy endpoint: Time to cardiovascular death, stroke, myocardial infarction (MI), or urgent arterial

    Time frame: 12 months

    Time to cardiovascular death, stroke, myocardial infarction (MI), or urgent arterial revascularization

  2. Primary safety endpoint (rivaroxaban versus placebo): Time to major bleeding according to the International Society of Thrombosis and Hemostasis classification

    Time frame: 12 months

    Time to major bleeding according to the International Society of Thrombosis and Hemostasis classification

  3. Primary safety endpoint (colchicine versus placebo): Hospitalization for respiratory infections

    Time frame: 12 months

    Time to first hospitalization for respiratory infections

Secondary outcomes

  1. Time to fatal or non-fatal stroke

    Time frame: 12 months

    Time to fatal or non-fatal stroke

  2. Time to CV death, MI, or stroke

    Time frame: 12 months

    Time to CV death, MI, or stroke

  3. Time to death from all causes, MI, or stroke

    Time frame: 12 months

    Time to death from all causes, MI, or stroke

  4. Time to fatal or non-fatal stroke, death, or transient ischemic attack

    Time frame: 12 months

    Time to fatal or non-fatal stroke, death, or transient ischemic attack

  5. Net clinical endpoint: time to CV death, MI, stroke, fatal bleeding, or critical site bleeding

    Time frame: 12 months

    Time to CV death, MI, stroke, fatal bleeding, or critical site bleeding

  6. Time to all-cause death

    Time frame: 12 months

    Time to all-cause death

Other outcomes

  1. modified Rankin score

    Time frame: 12 months

    modified Rankin score as ordinal outcome

  2. Venous thromboembolism

    Time frame: 12 months

    Time to first venous thromboembolism

  3. New-onset atrial fibrillation

    Time frame: 12 months

    time to new-onset atrial fibrillation

  4. Microvascular obstruction at head MRI (substudy)

    Time frame: 12 months

    Microvascular obstruction at head MRI (substudy)

Study contacts

Contact information is provided by the study sponsor or research team.

Remo Furtado, MD, PhD

CONTACT

[email protected]

55 11 59047339

Sponsors and collaborators

Lead sponsor

Brazilian Clinical Research Institute

Other

Collaborators

  • Alliança Diagnostic

Registry information

Official study title

A 2 x 2 Factorial Randomized Clinical Trial Evaluating Anti-inflammatory and Anti-thrombotic Strategy in Acute Ischemic Stroke

Acronym: ARCHIMEDES

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
May 2, 2024
Registry last updated
Feb 11, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.