Luana is going to be a fun subject. Just about everything she takes causes INR to rise.
WARFARIN SODIUM (in Coumadin Tablets) may interact with LEVOTHYROXINE (in Levothyroxine and Liothyronine Tablets)
Blood clotting normally occurs in response to a cut or other types of injuries to protect the body from excessive bleeding. Many substances are involved in the clotting process including various chemicals that are produced in the body like vitamin K.. Warfarin is generally used to prevent your blood from "coagulating" or forming blood clots. Although levothyroxine does not appear to directly interact with warfarin, it may increase the breakdown of vitamin K-dependent clotting factors and make your blood much less likely to clot. When levothyroxine and warfarin are used at the same time, the anticoagulant effect of warfarin may be increased and this may increase the risk of excessive bleeding. If these drugs are taken together, your doctor may want to monitor you closely for signs of bleeding (bruising, nose bleeds, ect). Blood tests can be used to make sure that you are getting the right amount of warfarin. If you are experiencing problems, it may be necessary to adjust the dose of warfarin.Ask your healthcare provider about these drugs and this potential interaction as soon as possible.
This interaction is well-documented and is considered major in severity.
Last Updated: December 2003
WARFARIN SODIUM (in Coumadin Tablets) may interact with PROPRANOLOL HYDROCHLORIDE (in Propranolol Hydrochloride Tablets)
The exact causes of this potential interaction are not understood completely, but propranolol may increase the anticoagulant effect of warfarin. Warfarin is generally used to prevent your blood from "coagulating" or forming blood clots. When propranolol and warfarin are used at the same time, the risk of excessive bleeding may increase. If these drugs are taken together, your doctor may want to monitor you more closely for 2 to 4 weeks after therapy with propranolol is either started or stopped. Blood tests can be used to make sure that you are getting the right amount of warfarin. If you are experiencing problems, it may be necessary to adjust the dose of warfarin. Discuss this potential interaction with your healthcare provider at your next appointment, or sooner if you think you are having problems.
This interaction is poorly documented and is considered moderate in severity.
Last Updated:May 2007
WARFARIN SODIUM (in Coumadin Tablets) may interact with AMIODARONE HYDROCHLORIDE (in Amiodarone Oral)
Amiodarone may block the breakdown of warfarin by the liver. If this happens, blood levels of warfarin could be increased and this could increase its anticoagulant effect. Warfarin is generally used to prevent your blood from "coagulating" or forming blood clots. When amiodarone and warfarin are used at the same time, your blood may be much less likely to clot and this may increase the risk of excessive bleeding. This potential interaction may continue for months after therapy with amiodarone has been stopped. If these drugs are taken together, your doctor may want to monitor you more closely for 6 to 8 weeks after therapy with amiodarone is either started or stopped. Blood tests can be used to make sure that you are getting the right amount of warfarin. If you are experiencing problems, it may be necessary to adjust the dose of warfarin.Ask your healthcare provider about these drugs and this potential interaction as soon as possible.
This interaction is well-documented and is considered major in severity.
Last Updated:February 2009