Ranitidin Versus Omeprazole in Patients Taking Clopidogrel
Primary Purpose
Coronary Artery Disease, Drug Interaction Potentiation
Status
Completed
Phase
Phase 4
Locations
Study Type
Interventional
Intervention
omeprazole
Ranitidine
Clopidogrel
Sponsored by
About this trial
This is an interventional treatment trial for Coronary Artery Disease focused on measuring clopidogrel, omeprazole, ranitidin, interaction, aggregability
Eligibility Criteria
Inclusion Criteria:
- Age > 18 years old
- Coronary artery disease, defined as previous myocardial infarction and/or coronary angioplasty and/or CABG surgery and/or coronariography showing obstruction of at least 50 % in one of major epicardial vessels
- Treatment with Acetylsalicylic Acid (ASA) 100 mg/day
Exclusion Criteria:
- Use on the last 7 days of any other antiplatelet drug beside ASA or oral anticoagulant
- Previous utilization of PPI or ranitidine in the last 7 days before randomization
- Any active bleeding
- Pregnancy or woman of childbearing age without contraceptive method
- Hemoglobin < 10 g/dL or hematocrit < 30 %, hematocrit > 50 %, platelets < 100.000/mm3 or > 500.000/mm3; creatinin clearance < 50 ml/minute
- Percutaneous coronary intervention (PCI) on the last 30 days before randomization (or PCI on the last year when drug-eluted stents are used); CABG surgery on the last 90 days; acute coronary syndrome on the last 60 days
- Active malignant neoplasm
- Active peptic ulcer disease on the last 60 days or upper gastrointestinal bleeding any time in life
- Known allergy to the drugs clopidogrel, ranitidine or omeprazole
- Refuse to participate in the study
Sites / Locations
Arms of the Study
Arm 1
Arm 2
Arm Type
Experimental
Experimental
Arm Label
omeprazole
ranitidine
Arm Description
Omeprazole 20 mg (oral route) twice a day will be given to the subjects for one week. This intervention will be compared with ranitidin 150 mg (oral route) twice a day.
Ranitidine 150 mg (oral route) twice a day will be given to the subjects for one week.
Outcomes
Primary Outcome Measures
Comparing Platelet Function of Patients on Dual Antiplatelet Therapy With ASA + Clopidogrel, Between the Groups Ranitidin and Omeprazole, After One Week of Randomized Treatment
One week after starting double-blind, double-dummy, randomized therapy with ranitidin or omeprazole on patients treated with DAPT, platelet function will be compared with the method VerifyNow, in P2Y12 Reactivity Units.
Comparing Platelet Function of Patients on Dual Antiplatelet Therapy With ASA + Clopidogrel, Between the Groups Ranitidin and Omeprazole, Using VerifyNow Method.
One week after starting double-blind, double-dummy, randomized therapy with ranitidin or omeprazole on patients treated with DAPT, platelet function will be compared with the method VerifyNow, in percent Inhibition of Platelet Aggregation (IPA) from baseline. IPA was calculated as the percent change in aggregability from baseline, with the formula IPA = (on-treatment aggregability minus baseline aggregability)/baseline aggregability. Since baseline aggregation is always, per definition, equal or more than on-treatment aggregation, there is no possibility that this number might be negative.
Secondary Outcome Measures
Full Information
NCT ID
NCT01896557
First Posted
June 19, 2013
Last Updated
July 5, 2018
Sponsor
University of Sao Paulo General Hospital
Collaborators
InCor Heart Institute
1. Study Identification
Unique Protocol Identification Number
NCT01896557
Brief Title
Ranitidin Versus Omeprazole in Patients Taking Clopidogrel
Official Title
Possible Drug Interaction Between Clopidogrel and Ranitidin or Omeprazole in Patients With Stable Coronary Heart Disease: a Comparative Study
Study Type
Interventional
2. Study Status
Record Verification Date
October 2011
Overall Recruitment Status
Completed
Study Start Date
October 2011 (undefined)
Primary Completion Date
June 2013 (Actual)
Study Completion Date
June 2013 (Actual)
3. Sponsor/Collaborators
Responsible Party, by Official Title
Sponsor
Name of the Sponsor
University of Sao Paulo General Hospital
Collaborators
InCor Heart Institute
4. Oversight
Data Monitoring Committee
Yes
5. Study Description
Brief Summary
Previous reports have shown a possible drug interaction between clopidogrel and proton pump inhibitors (PPI´s), which could result in increased number of adverse cardiovascular events among patients on dual antiplatelet therapy(DAPT). Because of this, ranitidin has been proposed as an alternative drug to PPI´s for prophylaxis of gastrointestinal bleeding in patients who need DAPT. The study´s aim is to test the hypothesis that ranitidin doesn´t have any influence on clopidogrel pharmacodynamic.
Detailed Description
Study population: 100 patients with Stable Coronary Artery Disease from Heart Institute
Inclusion Criteria:
Age > 18 years old
Coronary artery disease, defined as previous myocardial infarction and/or coronary angioplasty and/or Coronary Artery Bypass Graft (CABG) surgery and/or coronariography showing obstruction of at least 50 % in one of major epicardial vessels
Treatment with Acetylsalicylic Acid (ASA) 100 mg/day
Exclusion Criteria:
Use in the last 7 days of oral anticoagulant or any other antiplatelet drug beside ASA
Previous utilization of PPI or ranitidine in the last 7 days before randomization
Active bleeding
Pregnancy or woman of childbearing age without contraceptive method
Hemoglobin < 10 g/dL or hematocrit < 30 %, hematocrit > 50 %, platelets < 100.000/mm3 or > 500.000/mm3; creatinin clearance < 50 ml/minute
Percutaneous coronary intervention (PCI) on the last 30 days before randomization (or PCI on the last year when drug-eluted stents are used); CABG surgery on the last 90 days; acute coronary syndrome on the last 60 days
Active malignant neoplasm
Active peptic ulcer disease on the last 60 days or upper gastrointestinal bleeding any time in life
Known allergy to the drugs clopidogrel, ranitidine or omeprazole
Refuse to participate in the study]
Methodology: The study has a double-blind, double-dummy prospective design. Clopidogrel action is evaluated by platelet function tests: VerifyNow, bioimpedance aggregometry and Platelet Function Analyzer-100 (PFA-100). The patients have measurements of platelet function on three moments: before starting clopidogrel; 1 week after DAPT with clopidogrel (without loading dose) plus ASA; and after 1 week of randomization to ranitidin 150 mg bid or omeprazole 20 mg bid.
6. Conditions and Keywords
Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Coronary Artery Disease, Drug Interaction Potentiation
Keywords
clopidogrel, omeprazole, ranitidin, interaction, aggregability
7. Study Design
Primary Purpose
Treatment
Study Phase
Phase 4
Interventional Study Model
Parallel Assignment
Masking
ParticipantCare ProviderInvestigatorOutcomes Assessor
Allocation
Randomized
Enrollment
92 (Actual)
8. Arms, Groups, and Interventions
Arm Title
omeprazole
Arm Type
Experimental
Arm Description
Omeprazole 20 mg (oral route) twice a day will be given to the subjects for one week. This intervention will be compared with ranitidin 150 mg (oral route) twice a day.
Arm Title
ranitidine
Arm Type
Experimental
Arm Description
Ranitidine 150 mg (oral route) twice a day will be given to the subjects for one week.
Intervention Type
Drug
Intervention Name(s)
omeprazole
Other Intervention Name(s)
Peprazol, Losec, PPI
Intervention Description
Influence of omeprazole on clopidogrel pharmacodynamics will be evaluated.
Intervention Type
Drug
Intervention Name(s)
Ranitidine
Other Intervention Name(s)
Antak, H2 receptor blocker
Intervention Description
Influence of ranitidine on clopidogrel pharmacodynamics will be evaluated.
Intervention Type
Drug
Intervention Name(s)
Clopidogrel
Other Intervention Name(s)
Plavix, ADP receptor blocker
Intervention Description
Clopidogrel added to ASA therapy at the first medical visit, Open label 75 mg once a day will be given to all individuals as part of the protocol (since main outcome of interest is clopidogrel effect. Actual comparison arms are double blind ranitidine and omeprazole
Primary Outcome Measure Information:
Title
Comparing Platelet Function of Patients on Dual Antiplatelet Therapy With ASA + Clopidogrel, Between the Groups Ranitidin and Omeprazole, After One Week of Randomized Treatment
Description
One week after starting double-blind, double-dummy, randomized therapy with ranitidin or omeprazole on patients treated with DAPT, platelet function will be compared with the method VerifyNow, in P2Y12 Reactivity Units.
Time Frame
One week after randomized treatment exposure (omeprazole or ranitidine)
Title
Comparing Platelet Function of Patients on Dual Antiplatelet Therapy With ASA + Clopidogrel, Between the Groups Ranitidin and Omeprazole, Using VerifyNow Method.
Description
One week after starting double-blind, double-dummy, randomized therapy with ranitidin or omeprazole on patients treated with DAPT, platelet function will be compared with the method VerifyNow, in percent Inhibition of Platelet Aggregation (IPA) from baseline. IPA was calculated as the percent change in aggregability from baseline, with the formula IPA = (on-treatment aggregability minus baseline aggregability)/baseline aggregability. Since baseline aggregation is always, per definition, equal or more than on-treatment aggregation, there is no possibility that this number might be negative.
Time Frame
One week after drug exposure (omeprazole/ranitidine); 2 weeks after baseline
Other Pre-specified Outcome Measures:
Title
Comparison of the Primary Outcome With Bioimpedance Aggregometry
Description
After 1 week of randomization to ranitidin or omeprazole, the platelet function will also be analysed by other method: bioimpedance aggregometry with ADP 10 mcM as reagent
Time Frame
1 week after drug exposure
Title
Comparing the Main Outcome on Pre-specified Subgroups
Description
The main outcome will be compared on pre-specified subgroups:
elderly (age > 65 yrs-old) versus non-elderly
male versus female
smoking versus non-smoking patients
obese (BMI > 30 kg/m2) versus non-obese
diabetic versus non-diabetic
patients in use or not in use of statins
presence or not of genetic polymorphisms on cytochrome 2C19.
Time Frame
1 week after drug exposure
Title
Comparison of the Primary Outcome With PFA-100 (Collagen/ADP Cartridge)
Description
After 1 week of randomization to ranitidin or omeprazole, the platelet function will also be analysed by other method: PFA-100(Collagen/ADP cartridge).
Time Frame
1 week after drug exposure
10. Eligibility
Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria:
Age > 18 years old
Coronary artery disease, defined as previous myocardial infarction and/or coronary angioplasty and/or CABG surgery and/or coronariography showing obstruction of at least 50 % in one of major epicardial vessels
Treatment with Acetylsalicylic Acid (ASA) 100 mg/day
Exclusion Criteria:
Use on the last 7 days of any other antiplatelet drug beside ASA or oral anticoagulant
Previous utilization of PPI or ranitidine in the last 7 days before randomization
Any active bleeding
Pregnancy or woman of childbearing age without contraceptive method
Hemoglobin < 10 g/dL or hematocrit < 30 %, hematocrit > 50 %, platelets < 100.000/mm3 or > 500.000/mm3; creatinin clearance < 50 ml/minute
Percutaneous coronary intervention (PCI) on the last 30 days before randomization (or PCI on the last year when drug-eluted stents are used); CABG surgery on the last 90 days; acute coronary syndrome on the last 60 days
Active malignant neoplasm
Active peptic ulcer disease on the last 60 days or upper gastrointestinal bleeding any time in life
Known allergy to the drugs clopidogrel, ranitidine or omeprazole
Refuse to participate in the study
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
José C Nicolau, Professor
Organizational Affiliation
Director of Acute Coronary Care Unit
Official's Role
Principal Investigator
12. IPD Sharing Statement
Citations:
PubMed Identifier
27289472
Citation
Furtado RHM, Giugliano RP, Strunz CMC, Filho CC, Ramires JAF, Filho RK, Neto PAL, Pereira AC, Rocha TR, Freire BT, D'Amico EA, Nicolau JC. Drug Interaction Between Clopidogrel and Ranitidine or Omeprazole in Stable Coronary Artery Disease: A Double-Blind, Double Dummy, Randomized Study. Am J Cardiovasc Drugs. 2016 Aug;16(4):275-284. doi: 10.1007/s40256-016-0172-5.
Results Reference
derived
Learn more about this trial
Ranitidin Versus Omeprazole in Patients Taking Clopidogrel
We'll reach out to this number within 24 hrs