Individualized Administration of Warfarin by Polymorphisms of VKORC1 and CYP2C9 Genes

  • participants needed
  • sponsor
    Fujian Medical University
Updated on 3 February 2023


The purpose of this study is to explore the individualized administration model of warfarin suitable for Chinese people, and provide a scientific reference for the use of warfarin to Chinese people.


About 600 patients with VKORC1 and CYP2C9 gene mutations were included in the treatment of warfarin anticoagulant therapy. The main indications include valve replacement, atrial fibrillation, pulmonary embolism, etc., randomly divided into 2 groups, respectively, the control group (that is, the use of fixed-dose group), Bayesian-model group, the use of single-blind treatment method, to evaluate the number of major adverse events, TTR and INR adjustments in patients between different groups after three months of taking warfarin, and then to explore the individualized drug use model of warfarin suitable for Chinese population.

In the Bayesian group, according to the genotype of VKORC1 and CYP2C9, the stable dose was calculated by the dose prediction model of Bayesian, and the first three drugs were taken at this dose, and then adjusted to the actual stable dose according to the change of INR. Meanwhile, the control group was administered according to the traditional way, that is, the initial dose is 2.5 or 3mg/d and is gradually adjusted to a stable dose according to changes of INR. The monitoring frequency of INR is: once a day from the beginning of the drug to the time of discharge, once a week after discharge, and once a month after the stable dose is obtained. Detailed records of the number of days to reach a stable dose, the INR value and the occurrence of side effects and time are documented. The concrete steps are as follows:

  1. clinicians to judge the standard of the selection criteria;
  2. to obtain the consent of the patient and sign an informed consent certificate;
  3. to collect 2ml anticoagulant blood before the drug, fill in the application form for individualized drug use in warfarin, and indicate the experimental group and control group;
  4. the specimen assigned to the laboratory for Genotyping;
  5. lab to calculate the predicted stable warfarin dose and the results fed back to the clinician within one working day after receiving the specimen;
  6. in the control group, the drug retained at the regular dose, and the first 3 days of the experimental group administered at the predicted dose;
  7. the dosage of warfarin in the two groups of cases adjusted to the stable dose according to the value, and the adjustment amplitude of the experimental group also referred to the predicted stable dose.
  8. to monitor INR once a day during hospitalization, and to those who do not receive a stable dose of discharge, follow up and monitor INR once a week until a stable dose or medication is obtained for 90 days;
  9. to document clinical trial records, including the daily use of warfarin, each detection of the appearance of the situation like INR value, bleeding, venous embolism and other side effects.

Finallyaccording to the outcome parameters,statistical analysis were performed with SPSS 11.5 software. A value of P < 0.05 was considered statistically significant.

Condition Heart Valve Prosthesis
Treatment dose regime
Clinical Study IdentifierNCT03797534
SponsorFujian Medical University
Last Modified on3 February 2023

Similar trials to consider


Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note