Influence of Esomeprazole on Antiplatelet Action of Clopidogrel Associated With Aspirin

October 2, 2010 updated by: Ruttonjee Hospital

The investigators examine the influence of esomeprazole versus famotidine on antiplatelet action of clopidogrel associated with aspirin. At least 100 consecutive patients suffering from acute coronary syndrome or undergoing coronary artery stent implantation , who received aspirin (80 - 160 mg/day) and clopidogrel (300 mg loading dose, followed by 75 mg/day or 75mg/day for at least 7 consecutive days), are randomised to receive either esomeprazole 20 mg daily vs famotidine 40 mg daily in a double blinded manner. Clopidogrel effect was tested by measuring residual platelet reactivity (RPR) to ADP by VerifyNow P2Y12 assay (Accumetrics Inc, San Diego, Calif). At baseline, whole blood will be obtained for RPR at least 12 h after clopidogrel loading dose or at least 7 days of maintaince dose. Immediately obtaining the baseline blood, patients will be randomized to receive either esomeprazole (20 mg/day) or famotidine 40 mg/day for 28 days. Double blinding will be performed by encapsulation of study drugs. RPR will be measured again at the 28th day.

The investigators will compare the % inhibition and the P2Y12 reaction Units (PRU) at the 28-day treatment period in the 2 groups.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Anticipated)

100

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
      • Hong Kong, China
        • Ruttonjee Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • patients suffering from acute coronary syndrome or undergoing coronary artery stent implantation (PCI) , who received aspirin (80 - 160 mg/day) and clopidogrel (300 mg loading dose, followed by 75 mg/day), are recruited.

Exclusion Criteria:

  • known active peptic ulcer disease or gastrointestinal within 8 wk
  • known iron deficiency anemia with Hb < 10 gm/dl
  • mechanical ventilation
  • active cancer, liver cirrhosis, end-stage renal failure
  • life expectancy < 1 yr
  • known allergic to aspirin, clopidogrel, famotidine or esomeprazole
  • pregnancy, lactation, child-bearing potential in the absence of contraception,
  • co-prescription of NSAID, corticosteroid, or warfarin
  • non-oral feeding or impaired GI absorption e.g. vomiting
  • patient on proton pump inhibitor within 4 weeks

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: 1
oral esomeprazole 20 mg daily
Drug: esomeprazole 20 mg daily
oral famotidine 40 mg daily vs. oral esomeprazole 20 mg daily for 28 days
Active Comparator: 2
oral famotidine 40mg daily
Drug: famotidine 40 mg daily
oral famotidine 40 mg daily vs. oral esomeprazole 20 mg daily for 28 days

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
P2Y12 reaction units
Time Frame: 28 days
28 days

Secondary Outcome Measures

Outcome Measure
Time Frame
percent inhibition
Time Frame: 28 days
28 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Ruttonjee Hospital

Investigators

  • Principal Investigator: Fook Hong Ng, MBBS, Ruttonjee Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2010

Primary Completion (Actual)

September 1, 2010

Study Completion (Actual)

September 1, 2010

Study Registration Dates

First Submitted

February 2, 2010

First Submitted That Met QC Criteria

February 3, 2010

First Posted (Estimate)

February 4, 2010

Study Record Updates

Last Update Posted (Estimate)

October 5, 2010

Last Update Submitted That Met QC Criteria

October 2, 2010

Last Verified

October 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • HKEC 2007-176 VerifyNow

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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