Top of the page
Factor V Leiden is the most common inherited condition causing increased blood clotting. It increases the chances that your blood will form abnormal blood clots that can be dangerous. Clots can form in the veins near your bones that carry a lot of blood (deep veins), a condition called deep vein thrombosis. A clot can travel through the blood to a lung and cause a serious problem called a pulmonary embolism.
Many things can increase the chance of blood clots, including smoking and not being able to walk or move around for a long time. Your treatment may include a medicine (called a blood thinner) that prevents blood clots.
Factor V Leiden is caused by a faulty gene that you inherit from one or both parents. Talk with your doctor about whether other people in your family should be tested for the faulty gene.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse call line if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
Call 911 anytime you think you may need emergency care. For example, call if:
Call your doctor or nurse call line now or seek immediate medical care if:
Watch closely for changes in your health, and be sure to contact your doctor or nurse call line if you have any problems.
Go to https://www.healthwise.net/patientEd
Enter U525 in the search box to learn more about "Factor V Leiden: Care Instructions".
Current as of: November 4, 2020
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & E. Gregory Thompson MD - Internal Medicine & Martin J. Gabica MD - Family Medicine
Care instructions adapted under license by your healthcare professional. If you have questions about a medical condition or this instruction, always ask your healthcare professional. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
©2006-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.