Heparins/Dabigatran Interactions

This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug or commencing any course of treatment.

Medical warning:

Serious. These medicines may interact and cause very harmful effects. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.

How the interaction occurs:

Both heparins and anticoagulants decrease your body's ability to make clots. When these two medicines are taken together, their effects may be increased.

What might happen:

You may experience an increased chance for bleeding including bleeding from your gums, nosebleeds, unusual bruising, or dark stools.

What you should do about this interaction:

Let your healthcare professionals (e.g. doctor or pharmacist) know that you are taking these two medicines together. They may already may be aware of this interaction and may be monitoring you for it. If your doctor prescribes these medicines together, you may need to check your bleeding times more often. Do not start, stop, or change the dosage of any medicine before checking with them first. Let your doctor know right away if you have any symptoms of bleeding.

  • 1.Pradaxa (dabigatran etexilate mesilate) UK summary of product characteristics. Boehringer Ingelheim Limited August 18, 2011.
  • 2.Pradaxa (dabigatran etexilate mesylate) US prescribing information. Boehringer Ingelheim Pharmaceuticals, Inc. November, 2015.
  • 3.Pradax (dabigatran etexilate mesilate) Canadian prescribing information. Boehringer Ingelheim June 13, 2011.