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Comparison of Dual Antiplatelet Therapy De-escalation by Dose Reduction Versus Switching in Patients Undergoing PCI: The Switching Antiplatelet-8 (SWAP-8) Study

Comparison of Dual Antiplatelet Therapy De-escalation by Dose Reduction Versus Switching in Patients Undergoing PCI: A Prospective, Randomized Pharmacodynamic Study - The Switching Antiplatelet-8 (SWAP-8) Study

Who can join

Ages 18 and older · All sexes

Inclusion Criteria:

1. Patients who have undergone PCI and are on maintenance treatment with DAPT, consisting of low-dose aspirin with either prasugrel (10 mg qd) or ticagrelor (90 mg bid) as part of standard of care. In particular, patients who underwent PCI in the setting of an acute coronary syndrome will be eligible for randomization after ≥90 days post-PCI, while patients who underwent PCI in the setting of a chronic coronary syndrome ≥30 days post-PCI.
2. Age ≥18 years.
3. Provide written informed consent.

Exclusion Criteria:

1. Prior history of stent thrombosis
2. Prior cerebrovascular event
3. PCI within 30 days
4. Predicted poor metabolizer of clopidogrel based on CYP2C19 genotyping (e.g., \*2/\*2 or \*3/\*3),
5. On treatment with any oral anticoagulant (vitamin K antagonists, dabigatran, rivaroxaban, apixaban, edoxaban) or chronic low-molecular-weight heparin (at venous thrombosis treatment, not for prophylaxis)
6. Hemodynamic instability
7. Hypersensitivity to Aspirin, Clopidogrel, or Prasugrel
8. Known hematologic malignancies or thrombocytopenia (platelet count \<80x106/mL)
9. Known hemoglobinopathies or anemia (hemoglobin \<9 g/dL)
10. Pregnant and breastfeeding women \[women of childbearing age must use reliable birth control (i.e., oral contraceptives) while participating in the study\].

About the study

Dual antiplatelet therapy (DAPT) with low-dose aspirin and a P2Y12 inhibitor is the current standard of care in patients with coronary artery disease experiencing an acute event or undergoing percutaneous coronary intervention. However, the ischemic benefits are counterbalanced by a significant increase in bleeding events. Over time, different DAPT de-escalation strategies have been developed to reduce the bleeding risk while maintaining the ischemic protection, but there is currently no head-to-head comparison between them. The purpose of this clinical trial is to conduct a head-to-head comparison on the pharmacodynamic efficacy of DAPT de-escalation by dose reduction to low-dose prasugrel (5 mg od) and DAPT de-escation by switching from standard-dose more potent P2Y12 receptor inhibitor to standard-dose clopidogrel (75 mg). To determine if the PD profiles of these two strategies are comparable, we aim to conduct a non-inferiority study.

What is being tested

• clopidogrel 75 mg (drug)
• Prasugrel 5 mg (drug)

Sponsor: University of Florida · Participants: 78 · Started: Mar 10, 2025

Contact the study team

• Luis Ortega, MD, PhD · Phone: 904-244 2060
• Andrea Burton, MPH, CCRP · Phone: 904-244-5617

Official record on ClinicalTrials.gov — NCT06821191

Locations in the U.S.

Conditions

• Coronary Artery Disease

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.