Testing Colchicine against a placebo for venous thromboembolism
Official title: Colchicine to Quench the Inflammatory Response After Deep Vein Thrombosis (The Conquer-DVT Pilot Trial)
Colchicine to Quench the Inflammatory Response After Deep Vein Thrombosis: A Randomized Controlled Pilot Trial
- Phase 3
- 2 groups
- Sites in Ottawa, Windsor and 1 more city
- Recruiting
Interventions
- Medication
Colchicine 0.5 mg po
Colchicine 0.5 mg po once daily for 180 days.
- Medication
Placebo 0.5 mg po
Placebo 0.5 mg po once daily for 180 days.
Canadian Sites (4)
3 of 4 recruiting
- Recruiting
The Ottawa Hospital General Campus
Ottawa, Ontario
- Recruiting
Windsor Regional Hospital
Windsor, Ontario
- Recruiting
Centre de recherche du Centre hospitalier de l'Université de Montréal
Montreal, Quebec
- Not yet recruiting
The Sir Mortimer B. Davis Jewish General Hospital
Montreal, Quebec
Eligibility Criteria
See who this study is looking for12 criteria
The trial’s own eligibility text, word for word from the registry. Only the trial site can say who takes part.
Inclusion
- +Consenting patients 18 years of age or older with a first, acute, symptomatic proximal (popliteal vein or more proximal) objectively confirmed DVT of the lower extremity will be eligible to participate in the study.
Exclusion
- −Any of the following as measured within the past 1-3 months or at screeningScreeningThe checks done before joining, to see whether a study fits.Read more →: alanine, or aspartate aminotransferase \>3 times the upper limit of normal, total bilirubin \>2 times the upper limit of normal and a creatinine clearance by Cockcroft-Gault formula \<30 mL/min.
- −History of an allergic reaction or significant sensitivity to colchicine.
- −History of cirrhosis, chronic active hepatitis, or severe liver disease.
- −Requirement of colchicine for other indications.
- −Active or chronic diarrhea, or documented inflammatory bowel disease (i.e., Crohn's disease or ulcerative colitis), collagenous colitis or irritable bowel syndrome or existing blood dyscrasias.
- −Known or suspected, recent (\<30 days) or active infections (acute or chronic).
- −Recent (\<30 days) or chronic use of systemic (oral, intravenous) immunosuppressive drugs (including but not limited to steroids, tumor necrosis factor-alpha blockers, cyclosporine).
- −Known active cancer.
- −The use of medication with known drug-to-drug interactions (including but not limited to erythromycin or clarithromycin).
- −Unable or unwilling to provide consentInformed consentThe process of being told what taking part involves, then choosing freely.Read more →.
- −Pregnancy, breast feeding or may be considering pregnancy during the study period or women of childbearing potential unwilling to use appropriate contraception during sex;
In plain language
Assembled directly from this trial’s registry record. Every sentence traces to a field below — nothing here is generated or interpreted.
What this study is
This study is testing a treatment for a condition.
Phase 3Phase 3A large study comparing a treatment against the current standard.Read more → — a large study comparing this against the current standard, usually across many hospitals.
From the trial registry
Built from these fields:
- designModule.designInfo.primaryPurpose
- designModule.phases
Who receives what
There are 2 groups in this study.
Group A receives Colchicine 0.5 mg po.
Registry label: A: Experimental Arm: Colchicine
Group B, the placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group, receives Placebo 0.5 mg po.
Registry label: B: Control Arm : Placebo
From the trial registry
Built from these fields:
- armsInterventionsModule.armGroups[].label
- armsInterventionsModule.armGroups[].type
- armsInterventionsModule.armGroups[].interventionNames
How the study is run
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
You, the study team, the people giving the treatment, and the people analysing the results would all be kept unaware of which group you are in until the study ends.
From the trial registry
Built from these fields:
- designModule.designInfo.allocation
- designModule.designInfo.maskingInfo.masking
Is there a placebo?
One group receives a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → — a dummy treatment with no active medicine in it.
From the trial registry
Built from these fields:
- armsInterventionsModule.armGroups[].type
- armsInterventionsModule.armGroups[].interventionNames
Who the study is looking for
The study lists a minimum age of 18 years, with no upper limit given.
The study is open to people of any sex.
The study does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.
These are the criteria the study lists. Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part.
From the trial registry
Built from these fields:
- eligibilityModule.minimumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How big and how long
The study aims to enrol about 150 people.
The study is currently expected to finish around December 2027.
The main measurement is taken over: 12 months.
From the trial registry
Built from these fields:
- designModule.enrollmentInfo.count
- statusModule.completionDateStruct.date
- outcomesModule.primaryOutcomes[].timeFrame
What the study measures
Pilot Trial Primary OutcomePrimary endpointThe single main question the study is designed to answer.Read more →: Recruitment Rate — measured over 12 months.
Full-Scale Trial Primary Outcome: Post Thrombotic Syndrome — measured over 180 days.
From the trial registry
Built from these fields:
- outcomesModule.primaryOutcomes[].measure
- outcomesModule.primaryOutcomes[].timeFrame
Source: NCT06440694 on ClinicalTrials.gov. The full registry text is further down this page — this summary never replaces it.
Not medical advice. What do these terms mean?
What is being tested — in plain terms
About Colchicine 0.5 mg poDrug
Colchicine 0.5 mg po once daily for 180 days.
From the trial registry — its own words, unedited.
What a drug is here: A medicine — a chemical or small-molecule treatment — given as the thing being studied.
Read the full explanation → · in clinical review
About Placebo 0.5 mg poDrug
Placebo 0.5 mg po once daily for 180 days.
From the trial registry — its own words, unedited.
What a drug is here: A medicine — a chemical or small-molecule treatment — given as the thing being studied.
Read the full explanation → · in clinical review
Common questions
Answered from this trial’s registry record. Where the record doesn’t say, these answers say so rather than filling the gap.
Am I eligible for this trial?
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part. Concord cannot make that determination, and neither can any tool that has not examined you.
What the study lists: a minimum age of 18 years.
The full inclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more → and exclusion criteriaExclusion criteriaThe things that would prevent someone from taking part.Read more → are published on this page, exactly as the study team wrote them.
The useful next step is to bring this trial to your doctor. Answering a few questions first gives them something concrete to review.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.eligibilityCriteria
Is there a placebo?
Yes. This study includes a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group — a dummy treatment with no active medicine in it.
From the trial registry
- armsInterventionsModule.armGroups[].type
Would I know which treatment I am getting?
You, the study team, the people giving the treatment, and the people analysing the results would all be kept unaware of which group you are in until the study ends.
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
From the trial registry
- designModule.designInfo.maskingInfo.masking
- designModule.designInfo.allocation
Who can join?
The study lists a minimum age of 18 years, with no upper limit given.
It is open to people of any sex.
It does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can confirm whether a particular person can take part.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How long would this take?
The study's main measurement is taken over: 12 months.
The study as a whole is currently expected to finish around 2027-12-01.
How long any one person takes part can differ from the study length. The study team can tell you what the schedule looks like in practice.
From the trial registry
- outcomesModule.primaryOutcomes[].timeFrame
- statusModule.completionDateStruct.date
How many people are taking part?
The study aims to enrol about 150 people.
From the trial registry
- designModule.enrollmentInfo.count
Where is this happening?
This study lists 3 locations, including: Ottawa, Ontario, Canada; Windsor, Ontario, Canada; Montreal, Quebec, Canada.
Sites can open and close during a study, so confirm with the team before travelling.
From the trial registry
- trial_locations
About This Trial
This trial seeks to assess the feasibility of a full-scale, double-blind, placebo-controlled, randomized trial assessing whether low-dose colchicine (0.5 mg daily) reduces the risk of post-thrombotic syndrome (PTS) in patients with proximal lower extremity deep vein thrombosis (DVT).
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See if this trial could fit youThis page is for informational purposes only and does not constitute medical advice. Clinical trial eligibility can only be determined by the trial site after proper screening. Trial information is sourced from ClinicalTrials.gov and may not reflect the most current status. Always consult your healthcare provider before making decisions about clinical trial participation.