Myocardial InfarctionPhase 4OPTIMUS-5NCT02548650
Vorapaxar as an Add-On Antiplatelet Therapy in Patients With and Without Diabetes Mellitus
A Phase 4 study testing Vorapaxar, Clopidogrel and Aspirin in people with Myocardial Infarction and Diabetes Mellitus, run by University of Florida at 1 site in United States.
Trial summary
Dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 receptor inhibitor, more frequently clopidogrel, represents the standard of care for the long-term secondary prevention of atherothrombotic events in patients with myocardial infarction (MI) or peripheral arterial disease (PAD). Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Myocardial Infarction, Diabetes Mellitus, Peripheral Arterial Disease
- What is being tested?
- Vorapaxar, Clopidogrel and Aspirin
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 66 participants
- Where
- 1 siteUnited States
- Study dates
- 25 Mar 2016to 14 Feb 2019
- Phase
- Phase 4
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients with a prior MI between 2 weeks and 24 months or with PAD.
- On DAPT with low-dose aspirin (81mg od) and clopidogrel (75mg od) as per standard-of-care for at least 14 days.
- Age ≥ 18 years old.
Who cannot join
- History of acute coronary syndrome in the previous 2 weeks.
- History of stroke, transient ischemic attack, or intracranial hemorrhage.
- Active pathological bleeding, history of bleeding events or increased risk of bleeding.
- Known severe hepatic impairment.
- Use of strong cytochrome P450 3A4 inhibitors (e.g., ketoconazole, itraconazole, posaconazole, clarithromycin, nefazodone, ritonavir, saquinavir, nelfinavir, indinavir, boceprevir, telaprevir, telithromycin and conivaptan) or inducers (e.g., rifampin, carbamazepine, St. John's Wort and phenytoin).
- On treatment with any oral anticoagulant (vitamin K antagonists, dabigatran, rivaroxaban, apixaban, edoxaban).
Show all 12Show fewer
- On treatment with any antiplatelet agent other than aspirin and clopidogrel in the past 14 days.
- Creatinine clearance <30 mL/minute.
- Platelet count <80x106/mL
- Hemoglobin <10g/dL
- Hemodynamic instability
- Pregnant females
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Pharmacodynamic Effects of Vorapaxar as an Add-On Antiplatelet Therapy in Patients With and Without Diabetes Mellitus: The Optimizing Anti-Platelet Therapy In Diabetes MellitUS (OPTIMUS)-5 Study
Dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 receptor inhibitor, more frequently clopidogrel, represents the standard of care for the long-term secondary prevention of atherothrombotic events in patients with myocardial infarction (MI) or peripheral arterial disease (PAD). However, rates of ischemic recurrences remain high. Vorapaxar is a protease-activated receptor (PAR)-1 inhibitor, which exerts potent inhibition of thrombin-mediated platelet aggregation. Patients with diabetes mellitus (DM) are known to be at increased risk of recurrent atherothrombotic events, which translates into worse outcomes, despite the use of standard of care therapy. This is in part due to the hyperreactive platelet phenotype, which characterizes DM patients, and to inadequate response to oral antiplatelet agents, including clopidogrel. Therefore, vorapaxar is an attractive treatment option for DM patients with a prior MI. The pharmacodynamic (PD) effects of vorapaxar in DM patients and how these may differentiate from non-DM patients has not been explored. Further, the role of vorapaxar as part of a dual antithrombotic treatment regimen combined with clopidogrel (and stopping aspirin) represents another important area of clinical interest. The proposed prospective, parallel-design study conducted in patients post-MI or with PAD with and without DM will aim the assess the pharmacodynamic effects of vorapaxar in addition to standard DAPT with aspirin and clopidogrel as well as in combination with clopidogrel only following aspirin withdrawal.
Read the detailed description
Dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 receptor inhibitor, more frequently clopidogrel, represents the standard of care for the long-term secondary prevention of atherothrombotic events in patients with myocardial infarction (MI) or peripheral arterial disease (PAD). However, rates of ischemic recurrences remain high, in part due to the fact that other platelet signaling pathways, such as thrombin-induced platelet aggregation, continue to be activated. Vorapaxar is a novel, orally active, competitive and slowly reversible protease-activated receptor (PAR)-1 inhibitor, which exerts potent inhibition of thrombin-mediated platelet aggregation. It is approved for clinical use by the Food and Drug Administration for the reduction of thrombotic cardiovascular events in patients with a history of MI or with peripheral arterial disease. Patients with DM are known to be at increased risk of recurrent atherothrombotic events, which translates into worse outcomes, despite the use of standard of care therapy. This is in part due to the hyperreactive platelet phenotype, which characterizes DM patients, and to inadequate response to oral antiplatelet agents, including clopidogrel. Importantly, in DM patients with prior MI included in the TRA 2P trial, vorapaxar reduced the primary composite end point at 3 years by 27% and led to a greater absolute risk reduction compared with those without DM. Therefore, vorapaxar is an attractive treatment option for DM patients with a prior MI. However, to date the PD effects of vorapaxar in DM patients and how these may differentiate from non-DM patients has not been explored. Further, current trends in clinical practice are seeing many patients discontinue aspirin and maintain clopidogrel. Hence, the role of vorapaxar as part of a dual antithrombotic treatment regimen combined with clopidogrel (and stopping aspirin) represents another important area of clinical interest, in order to maximize ischemic protection while reducing the risk of bleeding. The proposed prospective, parallel-design study conducted in patients post-MI or with PAD with and without DM will aim the assess the pharmacodynamic effects of vorapaxar in addition to standard DAPT with aspirin and clopidogrel as well as in combination with clopidogrel only following aspirin withdrawal. Pharmacodynamic assessments will be performed at multiple time point, with different assays exploring multiple pathways of platelet aggregation.
- Being tested
- Vorapaxar, Clopidogrel, Aspirin
- Keywords
- myocardial infarction, diabetes mellitus, vorapaxar, peripheral arterial disease
- Medical subject headings
- Myocardial Infarction, Diabetes Mellitus, Peripheral Arterial Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
VorapaxarDrug
Also called Zontivity
Triple therapy with DAPT plus vorapaxar (vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days
ClopidogrelDrug
Also called Plavix
Triple therapy with DAPT plus vorapaxar (vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days
AspirinDrug
Also called ASA
Triple therapy with DAPT plus vorapaxar(vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days
| Study group | Role | What they receive |
|---|---|---|
| Patients with diabetes | Experimental | Triple therapy (vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days. Receives: Drug: Vorapaxar; Drug: Clopidogrel; Drug: Aspirin |
| Patients without diabetes | Active comparator | Triple therapy (vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days. Receives: Drug: Vorapaxar; Drug: Clopidogrel; Drug: Aspirin |
What is being measured
The primary outcome is the main question the study is designed to answer.
Maximal Platelet Aggregation in DM
Comparison of maximal platelet aggregation (%) measured by light transmittance aggregometry between between triple (vorapaxar plus DAPT) and dual (vorapaxar plus clopidogrel) therapy in diabetic patients
Measured: 30 days
Secondary outcomes (1)
Maximal Platelet Aggregation in Non-DM
Comparison of maximal platelet aggregation (%) measured by light transmittance aggregometry between between triple (vorapaxar plus DAPT) and dual (vorapaxar plus clopidogrel) therapy in non-diabetic patients
Measured: 30 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 Sep 2015 (estimated)
- Study start25 Mar 2016
- Primary completionDec 2018
- Study completion14 Feb 2019
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for Myocardial InfarctionStudies of the same condition, open and under way.
- More trials run by University of FloridaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 66 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Florida
- Sponsor type
- University, hospital or other
- Collaborators
- Merck Sharp & Dohme LLC
- Responsible party
- Sponsor
- Investigators
- Dominick J Angiolillo, MD, PhD, Principal investigator, University of Florida College of Medicine-Jacksonville
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02548650
- Sponsor's protocol ID
- IIS 53377
- Acronym
- OPTIMUS-5
- Status last verified
- Jan 2020
- First submitted
- 8 Sep 2015
- Last updated
- 12 Feb 2020
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Ortega-Paz L, Thomas CD, Laudani C, Giordano S, Franchi F, Tunehag KR, Rollini F, Durukan S, Rossi JS, Farahmandsadr M, Stouffer GA, Been L, Keeley EC, Duarte JD, Beitelshees AL, Lee CR, Cavallari LH, Angiolillo DJ. Impact of Race on Profiles of Platelet Reactivity and Clinical Outcomes in Clopidogrel-Treated Participants. Clin Pharmacol Ther. 2026 Jan;119(1):168-178. doi: 10.1002/cpt.70045. Epub 2025 Aug 28.
PubMed 40875095Franchi F, Rollini F, Kairouz V, Rivas Rios J, Rivas A, Agarwal M, Briceno M, Wali M, Nawaz A, Silva G, Shaikh Z, Maaliki N, Been L, Piraino J, Pineda AM, Suryadevara S, Soffer D, Zenni MM, Jennings LK, Bass TA, Angiolillo DJ. Pharmacodynamic Effects of Vorapaxar in Patients With and Without Diabetes Mellitus: Results of the OPTIMUS-5 Study. JACC Basic Transl Sci. 2019 Sep 1;4(7):763-775. doi: 10.1016/j.jacbts.2019.07.011. eCollection 2019 Nov.
PubMed 31998847
Study at a glance
From the registry record, last updated by the sponsor on 12 Feb 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Pharmacodynamic Effects of Vorapaxar as an Add-On Antiplatelet Therapy in Patients With and Without Diabetes Mellitus: The Optimizing Anti-Platelet Therapy In Diabetes MellitUS (OPTIMUS)-5 Study
- ClinicalTrials.gov ID
- NCT02548650
- Acronym / sponsor ID
- OPTIMUS-5 / IIS 53377
- Keywords
- myocardial infarction, diabetes mellitus, vorapaxar, peripheral arterial disease
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 66 participants (actual)
- Lead sponsor
- University of FloridaUniversity, hospital or other
- Collaborators
- Merck Sharp & Dohme LLC
- Study start
- 25 Mar 2016 (actual)
- Primary completion
- Dec 2018 (actual)
- Study completion
- 14 Feb 2019 (actual)
- First posted
- 14 Sep 2015 (estimated)
- Results
- Posted 27 Jan 2020
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 receptor inhibitor, more frequently clopidogrel, represents the standard of care for the long-term secondary prevention of atherothrombotic events in patients with myocardial infarction (MI) or peripheral arterial disease (PAD). However, rates of ischemic recurrences remain high. Vorapaxar is a protease-activated receptor (PAR)-1 inhibitor, which exerts potent inhibition of thrombin-mediated platelet aggregation. Patients with diabetes mellitus (DM) are known to be at increased risk of recurrent atherothrombotic events, which translates into worse outcomes, despite the use of standard of care therapy. This is in part due to the hyperreactive platelet phenotype, which characterizes DM patients, and to inadequate response to oral antiplatelet agents, including clopidogrel. Therefore, vorapaxar is an attractive treatment option for DM patients with a prior MI. The pharmacodynamic (PD) effects of vorapaxar in DM patients and how these may differentiate from non-DM patients has not been explored. Further, the role of vorapaxar as part of a dual antithrombotic treatment regimen combined with clopidogrel (and stopping aspirin) represents another important area of clinical interest. The proposed prospective, parallel-design study conducted in patients post-MI or with PAD with and without DM will aim the assess the pharmacodynamic effects of vorapaxar in addition to standard DAPT with aspirin and clopidogrel as well as in combination with clopidogrel only following aspirin withdrawal.
Detailed description
Dual antiplatelet therapy (DAPT) with aspirin and a P2Y12 receptor inhibitor, more frequently clopidogrel, represents the standard of care for the long-term secondary prevention of atherothrombotic events in patients with myocardial infarction (MI) or peripheral arterial disease (PAD). However, rates of ischemic recurrences remain high, in part due to the fact that other platelet signaling pathways, such as thrombin-induced platelet aggregation, continue to be activated. Vorapaxar is a novel, orally active, competitive and slowly reversible protease-activated receptor (PAR)-1 inhibitor, which exerts potent inhibition of thrombin-mediated platelet aggregation. It is approved for clinical use by the Food and Drug Administration for the reduction of thrombotic cardiovascular events in patients with a history of MI or with peripheral arterial disease. Patients with DM are known to be at increased risk of recurrent atherothrombotic events, which translates into worse outcomes, despite the use of standard of care therapy. This is in part due to the hyperreactive platelet phenotype, which characterizes DM patients, and to inadequate response to oral antiplatelet agents, including clopidogrel. Importantly, in DM patients with prior MI included in the TRA 2P trial, vorapaxar reduced the primary composite end point at 3 years by 27% and led to a greater absolute risk reduction compared with those without DM. Therefore, vorapaxar is an attractive treatment option for DM patients with a prior MI. However, to date the PD effects of vorapaxar in DM patients and how these may differentiate from non-DM patients has not been explored. Further, current trends in clinical practice are seeing many patients discontinue aspirin and maintain clopidogrel. Hence, the role of vorapaxar as part of a dual antithrombotic treatment regimen combined with clopidogrel (and stopping aspirin) represents another important area of clinical interest, in order to maximize ischemic protection while reducing the risk of bleeding. The proposed prospective, parallel-design study conducted in patients post-MI or with PAD with and without DM will aim the assess the pharmacodynamic effects of vorapaxar in addition to standard DAPT with aspirin and clopidogrel as well as in combination with clopidogrel only following aspirin withdrawal. Pharmacodynamic assessments will be performed at multiple time point, with different assays exploring multiple pathways of platelet aggregation.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Patients with diabetes | Experimental | Drug: Vorapaxar, Drug: Clopidogrel, Drug: AspirinTriple therapy (vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days. |
| Patients without diabetes | Active comparator | Drug: Vorapaxar, Drug: Clopidogrel, Drug: AspirinTriple therapy (vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- Patients with a prior MI between 2 weeks and 24 months or with PAD.
- On DAPT with low-dose aspirin (81mg od) and clopidogrel (75mg od) as per standard-of-care for at least 14 days.
- Age ≥ 18 years old.
Key exclusion criteria (12 listed)
- History of acute coronary syndrome in the previous 2 weeks.
- History of stroke, transient ischemic attack, or intracranial hemorrhage.
- Active pathological bleeding, history of bleeding events or increased risk of bleeding.
- Known severe hepatic impairment.
- Use of strong cytochrome P450 3A4 inhibitors (e.g., ketoconazole, itraconazole, posaconazole, clarithromycin, nefazodone, ritonavir, saquinavir, nelfinavir, indinavir, boceprevir, telaprevir, telithromycin and conivaptan) or inducers (e.g., rifampin, carbamazepine, St. John's Wort and phenytoin).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| VorapaxarAlso: ZontivityTriple therapy with DAPT plus vorapaxar (vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days | Drug | Patients with diabetes, Patients without diabetes |
| ClopidogrelAlso: PlavixTriple therapy with DAPT plus vorapaxar (vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days | Drug | Patients with diabetes, Patients without diabetes |
| AspirinAlso: ASATriple therapy with DAPT plus vorapaxar(vorapaxar 2.5mg od plus clopidogrel 75 mg od and aspirin 81 mg od) will be administered for 30 days; then patients will stop aspirin and will take dual treatment (vorapaxar 2.5mg od plus clopidogrel 75 mg od ) for other 30 days | Drug | Patients with diabetes, Patients without diabetes |
Primary outcome
Maximal Platelet Aggregation in DM
Time frame: 30 days
Comparison of maximal platelet aggregation (%) measured by light transmittance aggregometry between between triple (vorapaxar plus DAPT) and dual (vorapaxar plus clopidogrel) therapy in diabetic patients
1 secondary outcome
Maximal Platelet Aggregation in Non-DM
Time frame: 30 days
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 12 Feb 2020.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 40875095Ortega-Paz L, Thomas CD, Laudani C, Giordano S, Franchi F, Tunehag KR, Rollini F, Durukan S, Rossi JS, Farahmandsadr M, Stouffer GA, Been L, Keeley EC, Duarte JD, Beitelshees AL, Lee CR, Cavallari LH, Angiolillo DJ. Impact of Race on Profiles of Platelet Reactivity and Clinical Outcomes in Clopidogrel-Treated Participants. Clin Pharmacol Ther. 2026 Jan;119(1):168-178. doi: 10.1002/cpt.70045. Epub 2025 Aug 28.
- Derived from this study: PubMed 31998847Franchi F, Rollini F, Kairouz V, Rivas Rios J, Rivas A, Agarwal M, Briceno M, Wali M, Nawaz A, Silva G, Shaikh Z, Maaliki N, Been L, Piraino J, Pineda AM, Suryadevara S, Soffer D, Zenni MM, Jennings LK, Bass TA, Angiolillo DJ. Pharmacodynamic Effects of Vorapaxar in Patients With and Without Diabetes Mellitus: Results of the OPTIMUS-5 Study. JACC Basic Transl Sci. 2019 Sep 1;4(7):763-775. doi: 10.1016/j.jacbts.2019.07.011. eCollection 2019 Nov.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Dominick J Angiolillo, MD, PhD principal investigator
University of Florida College of Medicine-Jacksonville
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Vorapaxar, Clopidogrel and Aspirin in people with Myocardial Infarction and Diabetes Mellitus, run by University of Florida at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 12 Feb 2020. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 27 Jan 2020). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Maximal Platelet Aggregation in DM (time frame: 30 days). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02548650, which also lists 2 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 12 Feb 2020.