How do I use

After receiving your genetic results, the results can be interpreted at To proceed, go to and enter the following patient information is in the corresponding boxes: Age, sex, ethnicity, race, weight, height, smoking status, presence or absence of liver disease, indication, baseline international normalized ratio (INR), target INR and current medications. The genetic [...]

How do I use

What is

The website is provided by the Warfarin Dose Refinement (DR) Collaboration and IWPC (a group of international collaborations of biostatisticians, geneticists, pharmacists, and physicians who share anonymous data to improve warfarin dosing). is an independent website and is not under the control of our laboratory. The algorithm provided by is continually updated [...]

What is

What specific information will I receive after taking the Warfarin genetic test?

A genotype will be provided for each of the 11 SNPs tested in this analysis. The genotypes will indicate whether the individual has the homozygous wild type, heterozygous or homozygous variant/mutant allele at each position. This information is entered into the algorithm, which calculates an initial warfarin dose requirement and an estimated daily warfarin [...]

What specific information will I receive after taking the Warfarin genetic test?2016-12-20T19:06:31+00:00

What are the dangers of improper Warfarin dosing?

If the dose is too high, there is an increased risk of abnormal bleeding (hemorrhage). If the dose is too low, it indicates that it is insufficient to protect against blood clots (thrombosis).

What are the dangers of improper Warfarin dosing?2016-12-20T19:06:32+00:00

What is Warfarin?

A common anticoagulant drug prescribed to prevent the formation of blood clots (thrombosis) and their migration elsewhere in the body (thromboembolism).

What is Warfarin?2016-12-20T19:06:32+00:00

How do I receive my results?

You can choose to receive your results report by mail, email or both. The test includes one copy of the results by mail and one copy by email at no charge. The results report is issued immediately once the testing is completed.

How do I receive my results?2016-12-20T19:06:32+00:00

Are my results confidential?

Yes, your results are 100% confidential. No one will be able to access your account or your results unless you give them your confidential account login. You can change the password to your account at any time. Please remember to safeguard your login information and not share it with anyone.

Are my results confidential?2016-12-20T19:06:32+00:00

How long do I have to send the samples back?

The DNA testing kit does not have an expiry date so you can use the kit at any time. Once the DNA sample is collected, the sample should be returned to the laboratory for testing within 3 months of the collection date. The DNA sample will remain stable for 3 months at room temperature after [...]

How long do I have to send the samples back?2016-12-20T19:06:32+00:00

Can I have more than one copy of the results?

If your sample contains intact DNA, then a full DNA profile will be obtained. However, if your sample does not contain DNA or contains degraded DNA, then only a partial profile or no profile at all is obtained. Even if no profile is obtained, the cost still applies for each sample that is submitted.

Can I have more than one copy of the results?2016-12-20T19:06:32+00:00