Clopidogrel/Aspirin Interaction Study

NCT ID: NCT01102439

Last Updated: 2015-04-28

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

82 participants

Study Classification

INTERVENTIONAL

Study Start Date

2010-04-30

Study Completion Date

2013-02-28

Brief Summary

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This study will explore the effect of different doses of aspirin on the effects of double-dose or standard dose clopidogrel.

Detailed Description

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Study Hypothesis: Patients receiving double-dose compared with standard-dose clopidogrel will have increased blood concentrations of the active metabolite of clopidogrel and greater inhibition of ADP-induced platelet aggregation when also treated with acetylsalicylic acid (ASA) 325 mg/d as compared to ASA 81 mg/d.

Conditions

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Coronary Artery Disease

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

FACTORIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Standard dose clopidogrel

300 mg Loading x 1 day, 75 mg/d x 13 days

Group Type ACTIVE_COMPARATOR

Clopidogrel

Intervention Type DRUG

300 mg loading dose, then 75 mg daily

Double dose clopidogrel

600 mg Loading x 1 day, 150 mg/d x 6 days, 75 mg/d x 7 days

Group Type EXPERIMENTAL

Clopidogrel

Intervention Type DRUG

600 mg loading dose, 150 mg daily day 2-7, then 75 mg daily

Standard dose aspirin

Aspirin 81mg/d x 14 days

Group Type ACTIVE_COMPARATOR

Aspirin

Intervention Type DRUG

81 mg daily

High dose aspirin

Aspirin 325 mg/d x 14 days

Group Type EXPERIMENTAL

Aspirin

Intervention Type DRUG

325 mg daily

Interventions

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Clopidogrel

300 mg loading dose, then 75 mg daily

Intervention Type DRUG

Clopidogrel

600 mg loading dose, 150 mg daily day 2-7, then 75 mg daily

Intervention Type DRUG

Aspirin

81 mg daily

Intervention Type DRUG

Aspirin

325 mg daily

Intervention Type DRUG

Other Intervention Names

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Plavix Plavix Entrophen Novasen

Eligibility Criteria

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Inclusion Criteria

* \> 1 month post myocardial infarction (MI), unstable angina or stent patients with stable condition
* Receiving regular ASA (81mg/d) and clopidogrel (75mg/d) for at least 1 week
* Written informed consent

Exclusion Criteria

* Age \< 18 years old
* Liver disease with transaminases and/or bilirubin \> 1.5x upper limits of normal (ULN) (within 3 months of randomization)
* Renal impairment with creatinine clearance \< 30 ml/min (within 3 months of randomization)
* Platelet count \< 100x109/L and/or Hb\< 100g/L (within 3 months of randomization)
* Use of oral anticoagulants or nonsteroidal antiinflammatory drug (NSAID) within the last 10 days or planned use during the study
* Use of antiplatelet agent other than aspirin and clopidogrel within the last 10 days
* High risk of bleeding (e.g. recent gastrointestinal bleeding, bleeding diathesis)
* Uncontrolled hypertension (\> 180/110mmHg)
* Current smoker with ≥ 5 cigarettes/day
* Previously entered in this study or just finished other study within 2 weeks before recruitment
* Medical, geographic, or social factors making study participation impractical, or inability to provide written informed consent
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Population Health Research Institute

OTHER

Sponsor Role lead

Responsible Party

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John Eikelboom

MD.

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Yan Liang, MD

Role: PRINCIPAL_INVESTIGATOR

Population Health Research Institute

John Eikelboom, MD.

Role: STUDY_DIRECTOR

Population Health Research Institute

Locations

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Population Health Research Institute

Hamilton, Ontario, Canada

Site Status

Countries

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Canada

Other Identifiers

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10-082

Identifier Type: -

Identifier Source: org_study_id

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