CompletedEarly Phase 1

Asprin Dosing Estimator in Healthy Adults

United States57 participantsStarted 2021-02-15

Plain-language summary

Understanding sources of variability in human drug dosing is important to the beneficial and safe use of any drug. Understanding and applying the science of individualizing a drug dose to a patient is called precision medicine. Aspirin is one of the oldest most utilized medications for its ability to lower fever, relieve pain, and to reduce the stickiness of platelets (tiny blood cells that help your body form clots to stop bleeding. Aspirin dosing is currently the same for all patients and is not individualized. In the last century, aspirin has shown benefit in reducing cancer, stroke, and preventing cardiovascular events after one has already had a heart attack or stroke. Previous human studies have not found consistent positive effects of aspirin when dosed by body weight. Therefore, how should aspirin be dosed in 2019? Aspirin resistance is the failure of aspirin to reduce platelet stickiness and thin the blood and most importantly, is associated with higher risk of heart attacks and strokes. Aspirin resistance may occur due to not taking aspirin on a regular basis, differences in how platelets behave in some persons, use of over the counter pain medicines like Motrin®, reduced amount of drug in the body, and/or a lack of being able to predict a dose for a certain individual. To find out the best way to dose aspirin, the investigators propose to study healthy volunteers (persons without any known disease) with different ages and body sizes to see if aspirin blood levels are tied to platelet stickiness. This information will be used to mathematically build a computer-based picture of aspirin dosing that will help physicians pick the best dose of aspirin for each patient. The investigators will then extend studies for the aspirin dose estimator to be used in other countries in people with heart problems and stroke, recording future events in a randomized (i.e., coin toss) manner, to determine if the ability of the aspirin dose estimator to prevent future heart attacks and stroke compared to people receiving aspirin doses that were chosen without the estimator.

Who can participate

Age range18 Years – 55 Years

SexALL

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Inclusion Criteria: * Ages 18-55 years old (male or female) * Healthy Volunteers (medication free without acute or chronic significant health problems or pathologies) Exclusion Criteria: * History of asthma * History of chronic bronchitis * History of emphysema * History of renal impairment (eGFR \< 30 ml/min) * History of hypertension (reviewed by study staff) * History of hyperlipidemia * History of diabetes * History of smoking (within last month) * Current depression or anxiety requiring medication therapy * Inability to finish the study for any reason * Any current pathological condition outside of normal range * Thrombocytopenia (platelet count \< 150 K/µL) * Other known platelet disorders (eg. von Willebrand disease, Glanzmann thrombasthenia, Bernard-Soulier Syndrome) * Current use of dipyradamole, PGY 12 inhibitors, NSAIDs * Or as otherwise determined by the investigative team