PACT (Platelet Activity After Clopidogrel Termination)

Completed · Not applicable · Has a placebo group

Conditions studied: Blood Platelets, Clopidogrel

In brief

Clopidogrel is a medication that is used to decrease the ability of platelets to form blood clots. The theory has been proposed that, in patients with coronary artery disease or stroke, increased platelet function after discontinuation of clopidogrel therapy is associated with an increased clotting risk. However, this theory has never been rigorously tested. The goal of this research is to determine whether discontinuation of clopidogrel results in increased platelet function.

Key facts

Study ID

NCT00619073

Run by

University of Massachusetts, Worcester

People needed

15

Starts

2008-04-01

Expected to finish

2009-05-01

Last updated by the study team

2018-05-31

Who can join

Age: 21 and older, up to 70. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Must be a normal healthy subject
• Must be between 21-70 years old
• Must be able to take aspirin and clopidogrel.
• Must be able to have blood drawn 16 times over approximately 3 months.

You may not qualify if…

• Subject who is currently taking aspirin or another anti-platelet drug such as clopidogrel. Subject must be free of these medications for 10 days before enrolling in this study.
• Subject who is currently taking a non-steroidal anti-inflammatory drug such as ibuprofen or naproxen. Subject must be free of these medications for 3 days before enrolling in this study.
• Subject who is currently taking medications for depression or medications that lower blood pressure or lower blood sugar.
• Subject who are pregnant or may become pregnant during the study or who is breast feeding.
• Subject with a known allergy to aspirin or clopidogrel.
• Cigarette smoking or use of other nicotine product.
• Subject with a history of any of the following: coronary artery disease; stroke; bleeding disorder; ongoing bleeding; previous life-threatening hemorrhage; stomach ulcers; gastrointestinal bleeding within the past 1 month; major surgery within the past 1 month; minor surgery within the past 2 weeks; or platelet transfusion within the past 7 days.
• Subject with a blood count, measured on the pre-study drug blood sample, that is not in the normal range.
• Subject who is enrolled in another clinical trial of an investigational drug.

Where it is running

• University of Massachusetts Medical School — Worcester, Massachusetts, United States

Full record on ClinicalTrials.gov

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