Anagrelide/Aspirin 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 medicines can affect how the platelets in your blood, which are used to make clots, work.

What might happen:

Taking these medicines together may increase your risk of bleeding.

What you should do about this interaction:

Make sure your healthcare professionals (e.g. doctor or pharmacist) know that you are taking these medicines together. Do not take products containing aspirin unless instructed by the doctor who is treating your thrombocythemia. If you have any signs of bleeding, such as bleeding from your gums, nosebleeds, unusual bruising, or dark stools, contact your doctor right away.Your healthcare professionals may already be aware of this interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.

  • 1.Harrison CN, Campbell PJ, Buck G, Wheatley K, East CL, Bareford D, Wilkins BS, van der Walt JD, Reilly JT, Grigg AP, Revell P, Woodcock BE, Green AR. Hydroxyurea compared with anagrelide in high-risk essential thrombocythemia. N Engl J Med 2005 Jul 7;353(1):33-45.
  • 2.Agrylin (anagrelide hydrochloride) US prescribing information. Shire US Inc. July, 2015.