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Showing 1–24 of 155 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Platelet aggregation Clear all
Completed No phase listed Observational

Prospective Evaluation of Bleeding Risk of Anticoagulant and Anti-platelet Therapy

NCT00625248
View directory record Official record
Conditions
Bleeding
Interventions
Antithrombotics
Drug
Lead sponsor
Pain Management Center of Paducah
Other
Eligibility
18 Years and older
Enrollment
12,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Paducah, Kentucky
Source: ClinicalTrials.gov public record
Updated Jun 23, 2013 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of MitoQ on Platelet Function and Reactive Oxygen Species Generation in Patients With Sickle Cell Anemia

NCT04109820
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
MitoQ
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
5
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Long Term Cocoa Flavanol Intake on Blood Pressure and Platelet Function in Healthy Adults, Part 2

NCT02447783
View directory record Official record
Conditions
Healthy
Interventions
Control Capsules, Mars Cocoa Extract Capsules
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
30 Years to 55 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 5, 2026, 8:39 AM EDT
Withdrawn Phase 2 Interventional

Ticagrelor vs. Prasugrel Effects on Infarct Size

NCT02507323
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
ticagrelor, prasugrel, Placebo
Drug
Lead sponsor
Yochai Birnbaum
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
3
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 3, 2016 · Synced Sep 5, 2026, 8:39 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Low Dose Aspirin Studied With the AggreGuide

NCT01603966
View directory record Official record
Conditions
Platelet Aggregation
Interventions
Not listed
Lead sponsor
Edward R. Teitel, M.D.
Industry
Eligibility
18 Years to 70 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 16, 2012 · Synced Sep 5, 2026, 8:39 AM EDT
Not listed Phase 3 Interventional

Safety and Efficacy of Low-Dose Ticagrelor in Chinese Patients With NSTE-ACS

NCT02415803
View directory record Official record
Conditions
Non ST Segment Elevation Acute Coronary Syndrome
Interventions
low-dose ticagrelor, conventional-dose ticagrelor, Clopidogrel
Drug
Lead sponsor
First Affiliated Hospital of Harbin Medical University
Other
Eligibility
18 Years to 75 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2014
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Apr 13, 2015 · Synced Sep 5, 2026, 8:39 AM EDT
Active, not recruiting Not applicable Interventional

Thromboelastography With Platelet Mapping to Guide Antiplatelet Therapy After Lower Extremity Revascularization

NCT07597239
View directory record Official record
Conditions
Thrombosis, Arterial Occlusive Diseases, Thromboelastography (TEG), Peripheral Arterial Disease(PAD), Stent Thrombosis, Platelet Inhibition, PRU(Platelet Reactivity Unit)
Interventions
Aspirin, Clopidogrel, Ticagrelor, Platelet Reactivity Testing, Thromboelastography with Platelet Mapping
Drug · Diagnostic Test
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
60 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 4 Interventional

Effect of Thiazolidinedione Treatment Vascular Risk Markers

NCT00571506
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, Vascular Diseases
Interventions
Rosiglitazone, Pioglitazone
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
40 Years to 65 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Dec 8, 2009 · Synced Sep 5, 2026, 8:39 AM EDT
Completed No phase listed Observational

Platelet Sub-study of the TWILIGHT Trial

NCT04001374
View directory record Official record
Conditions
Coronary Artery Disease, Myocardial Infarction
Interventions
Ticagrelor, ASA
Drug
Lead sponsor
Juan Badimon
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 25, 2020 · Synced Sep 5, 2026, 8:39 AM EDT
Terminated Phase 2 Interventional Results available

Walking Effect of Long Term Ticagrelor in Subjects With PAD Who Have Undergone EVR

NCT02227368
View directory record Official record
Conditions
Peripheral Artery Disease (PAD)
Interventions
Ticagrelor, Comparator
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
50 Years to 130 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
10
States / cities
Daytona Beach, Florida • Jacksonville, Florida • Ocala, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2017 · Synced Sep 5, 2026, 8:39 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Thrombocytopenia and Bleeding in Wiskott-Aldrich Syndrome (WAS) Patients

NCT00909363
View directory record Official record
Conditions
Wiskott-Aldrich Syndrome, Thrombocytopenia, Bleeding
Interventions
Promacta, blood drawing in patients with WAS, blood drawing in healthy controls
Drug · Diagnostic Test
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
3 Months to 80 Years · Male only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 17, 2019 · Synced Sep 5, 2026, 8:39 AM EDT
Completed No phase listed Observational

The Impact of Diabetes on REvascularization

NCT03085524
View directory record Official record
Conditions
Peripheral Arterial Disease, Diabetes Mellitus
Interventions
Platelet function testing, Vascular ultrasonography
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
35 Years and older
Enrollment
215 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
38
States / cities
Long Beach, California • Los Angeles, California • San Francisco, California + 33 more
Source: ClinicalTrials.gov public record
Updated Jul 7, 2024 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 2 Interventional Results available

Escalating Clopidogrel by Involving a Genetic Strategy - Thrombolysis In Myocardial Infarction 56

NCT01235351
View directory record Official record
Conditions
Myocardial Infarction, Percutaneous Coronary Intervention
Interventions
Clopidogrel
Drug
Lead sponsor
The TIMI Study Group
Other
Eligibility
18 Years to 75 Years
Enrollment
335 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 14, 2019 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 2 Interventional Results available

Crushed Ticagrelor Versus Eptifibatide Bolus + Clopidogrel

NCT02925923
View directory record Official record
Conditions
Acute Coronary Syndrome, Angina, Unstable
Interventions
Ticagrelor, Eptifibatide, Clopidogrel
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 3, 2020 · Synced Sep 5, 2026, 8:39 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

PAR Regulation of Platelet Function in Diabetic Patients

NCT00855374
View directory record Official record
Conditions
Coronary Artery Disease, Acute Coronary Syndrome, Diabetes, Metabolic Syndrome
Interventions
Not listed
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
195 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 10, 2017 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 4 Interventional

Effect of Indinavir Plus Two Other Anti-HIV Drugs on Blood Clotting in HIV-Positive Males With Hemophilia

NCT00002386
View directory record Official record
Conditions
HIV Infections, Hemophilia A
Interventions
Indinavir sulfate, Lamivudine, Stavudine, Zidovudine, Zalcitabine, Didanosine
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
16 Years and older · Male only
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
7
States / cities
San Francisco, California • Washington D.C., District of Columbia • Atlanta, Georgia + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 5, 2026, 8:39 AM EDT
Not listed Phase 4 Interventional

Overcoming High On-Treatment Platelet Reactivity (HPR) During Prasugrel Therapy With Ticagrelor

NCT01869309
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Prasugrel, Ticagrelor
Drug
Lead sponsor
LifeBridge Health
Other
Eligibility
18 Years to 75 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 20, 2014 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 2 Interventional Results available

Study of the Combination Therapy of Rt-PA and Eptifibatide to Treat Acute Ischemic Stroke (CLEAR-FDR)

NCT01977456
View directory record Official record
Conditions
Stroke, Brain Infarction
Interventions
Eptifibatide
Drug
Lead sponsor
Arthur Pancioli
Other
Eligibility
18 Years to 85 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
8
States / cities
Edgewood, Kentucky • Florence, Kentucky • Fort Thomas, Kentucky + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 20, 2016 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 4 Interventional Results available

Platelet Inhibition in Patients With Systolic Heart Failure

NCT01765400
View directory record Official record
Conditions
Systolic Heart Failure
Interventions
Prasugrel 10 mg daily x 2 weeks, Clopidogrel 75 mg daily x 2 weeks
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 9, 2023 · Synced Sep 5, 2026, 8:39 AM EDT
Not listed Not applicable Interventional

The Inhibition of Platelet Antiaggregating Activity of Clopidogrel by Atorvastatin Detected by Erythromycin Breath Test: a Metabolic Inhibition of Hepatic Cytochrome P450-3A

NCT00004564
View directory record Official record
Conditions
Hypercholesterolemia, Thrombosis
Interventions
Clopidogrel, Atorvastatin
Drug
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
18 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 2 Interventional

Personalized Antiplatelet Secondary Stroke PRevenTion

NCT03979781
View directory record Official record
Conditions
Ischemic Stroke, TIA
Interventions
tailored antiplatelet selection, standard of care
Drug
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years to 100 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Dec 14, 2023 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 2 Interventional Results available

Trial in Subjects Undergoing Cardiac Catheterization With Planned Percutaneous Coronary Intervention With Stenting

NCT00357968
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Prasugrel, Clopidogrel, Placebo for Prasugrel, Placebo for Clopidogrel
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older
Enrollment
201 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
4
States / cities
Jacksonville, Florida • Worcester, Massachusetts • Ann Arbor, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 30, 2010 · Synced Sep 5, 2026, 8:39 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Chlorthalidone and HCTZ Impacts on Platelet Activation

NCT02100462
View directory record Official record
Conditions
Hypertension
Interventions
Chlorthalidone 12.5 mg, Hydrochlorothiazide 25 mg, Aspirin 81 mg
Drug
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Dec 13, 2015 · Synced Sep 5, 2026, 8:39 AM EDT
Completed Phase 3 Interventional Results available

Pentoxifylline Treatment in Acute Pancreatitis (AP)

NCT02487225
View directory record Official record
Conditions
Acute Pancreatitis (AP), Gallstone Pancreatitis, Alcoholic Pancreatitis, Trauma Acute Pancreatitis, Hypertriglyceridemia Acute Pancreatitis, Idiopathic (Unknown) Acute Pancreatitis, Medication Induced Acute Pancreatitis, Cancer Acute Pancreatitis, Miscellaneous (i.e. Acute on Chronic Pancreatitis)
Interventions
Pentoxifylline, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 100 Years
Enrollment
83 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 22, 2019 · Synced Sep 5, 2026, 8:39 AM EDT