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Aspirin Resistance in Trinidad.

NCT06228820 · Status: COMPLETED · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 48

Last updated 2025-09-12

No results posted yet for this study

Summary

Aspirin's beneficial effect is mediated via the inhibition of arachidonic acid (AA) activation of platelets. It is detected by demonstrating a decrease in platelet function and/or a decrease in prostaglandin metabolites. Besides inhibiting the formation of thromboxane A2 from arachidonic acid, Aspirin has a host of platelet-independent effects that complement its platelet-inhibitory effects.

The phenomenon of "Aspirin resistance" is based on the observation of clinical events in some patients taking Aspirin and/or a diminished platelet aggregation inhibitory response to Aspirin therapy. It has been suggested that many individuals taking Aspirin have become resistant to this drug. Unfortunately, laboratory assays used to monitor the efficacy of Aspirin are far from accurate, and the results are not reproducible. Multiple studies demonstrate non-compliance using repeat testing for platelet inhibition in patients with an initial inadequate response to Aspirin. When the test is repeated under the condition that the ingestion of the test Aspirin is assured, the patients' platelets are inhibited. Patients with an inadequate Aspirin response have an increased likelihood of subsequent vascular events.

Conditions

  • Platelet Dysfunction Due to Drugs

Interventions

DRUG

Aspirin 81Mg Ec Tab

Healthy patients will then undergo at least a 2-week course of 81mg of Bayer Aspirin per oral daily, followed by platelet function testing. The patients will then undergo a washout period of 2 weeks, followed by another 2-week course of 81mg Vazalore Aspirin per oral daily, followed by a second round of platelet function testing.

Sponsors & Collaborators

  • The University of The West Indies

    lead OTHER

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
74 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-01-15
Primary Completion
2024-12-15
Completion
2024-12-15

Countries

  • Trinidad and Tobago

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06228820 on ClinicalTrials.gov