Advertisement

What are the risks of combining warfarin (Coumadin) and Viagra?

Howard E. Lewine, MD
Hospitalist
Warfarin (Coumadin) does not have any direct interaction with sildenafil (Viagra). This is also true for the other commonly used drugs to treat erectile dysfunction. These include tadalafil (Cialis) and vardenafil (Levitra).

However, you may want to be cautious if you tend to develop a fast heart rate with your atrial fibrillation. Some people with atrial fibrillation develop low blood pressure when they have an increased heart rate. Viagra and the other drugs above could exaggerate the drop in blood pressure during sex.

When starting Viagra or a similar drug, it's safest to start with a low dose as directed by your doctor.

Ask your doctor or pharmacist if any of your other drugs could interact with the Viagra.
Harvard Medical School Heart Disease: A guide to preventing and treating coronary artery disease

More About this Book

Harvard Medical School Heart Disease: A guide to preventing and treating coronary artery disease

Most people who develop heart disease at least 8 in every 10 have one or more major risk factors that are within their power to change. These include lack of exercise, high blood pressure, and...

Continue Learning about Anticoagulant

What are side effects of anticoagulants?
Intermountain HealthcareIntermountain Healthcare
Normal side effects of anticoagulants can include: Bruising Prolonged bleeding from small cuts ...
More Answers
Is it safe to stop taking blood thinners for afib before hip surgery?
Rishi Anand, MDRishi Anand, MD
If you suffer from atrial fibrillation (afib) and are taking blood thinners (anticoagulants), you wi...
More Answers
What does it mean if my mother's PT/INR test result is too high?
Stacy Wiegman, PharmDStacy Wiegman, PharmD
If your mother's PT/INR test result is too high, it means that her dose of warfarin is too high,...
More Answers
What is an anticoagulant?
Brigham and Women's HospitalBrigham and Women's Hospital
An anticoagulant (anti means against, and coagulant refers to blood clotting) or "blood thinner"...
More Answers

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.