WithdrawnPhase 4

PRospective Evaluation Comparing Initiation of Warfarin StrategiEs (PRECISE): Pharmacogenetic-guided Versus Usual Care

Stopped: similar large study planned by NHLBI

United States0Started 2006-07

Plain-language summary

Warfarin (also called Coumadin®) is an anticoagulant drug (blood thinner) given to patients to help prevent blood clots from forming or to help prevent the growth of an existing blood clot. The purpose of this study is to collect information on a possible method used to determine the best warfarin dose for people before they start warfarin. This study will focus on finding out if a person's stable dose can be better predicted by using a new approach (called "pharmacogenetic-guided dosing") compared to the current warfarin dosing method. The pharmacogenetic-guided dosing method (the new warfarin dosing method) will use a person's specific health and genetic information to calculate a patient's warfarin dose at the beginning of warfarin treatment. The hope is that through this research, we may someday be able to use an individual's genetic information to guide the selection of their specific warfarin dose at the beginning of treatment, leading to precise warfarin dosing and less need for the current trial and error process.

Who can participate

Age range

18 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Newly initiating warfarin Exclusion Criteria: * Previous use of warfarin * Cancer * Hepatic Disease * History of alcoholism * Diarrheal illness * Febrile Illness * Blood dyscrasias * Pregnancy * Medical plan to hold warfarin administration before stable dose is achieved (ie. for surgical intervention) * Dementia * Active bleed * Aneurysm

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Accuracy of the initial versus the stable warfarin dose, measured as mean absolute difference in initial versus stable dose

Trial details

NCT IDNCT00377143

SponsorUniversity of Florida

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2006-08

View on ClinicalTrials.gov More Blood Coagulation Disorders trials