Use of other medications while taking anticoagulants

Anticoagulant medications cause the blood to clot more slowly. While taking an anticoagulant, it is necessary to keep a delicate balance between:

  • Having your blood clot too quickly, which increases your risk for clots.
  • Having your blood clot too slowly, which increases your risk for bleeding.

To maintain this balance and prevent complications, you should be aware of changes you may need to make in your lifestyle.

Medication interactions

Many medications can interfere with blood-clotting time and should be avoided. For example, aspirin and nonsteroidal anti-inflammatory drugs (NSAIDs) can raise your risk of bleeding.

Do not take any medications, vitamins, or minerals unless you first talk to your doctor.

Some of the more common medications that may interfere with blood clotting are:

  • Aspirin.
  • Nonsteroidal anti-inflammatory drugs, such as ibuprofen (for example, Motrin).
  • Some antibiotics.
  • Some seizure medications.
  • Birth control pills or patches, or hormone therapy.


Author: Robin Parks, MSLast Updated: January 15, 2008
Medical Review: E. Gregory Thompson, MD - Internal Medicine
Jeffrey J. Gilbertson, MD - Cardiovascular Surgery

© 1995-2008 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

Click here to learn about Healthwise
Click here to learn about Healthwise