1 interaction was found for the drugs you selected.
WARFARIN SODIUM in Warfarin
may interact with ACETAMINOPHEN in Sudafed Sinus and Cold
Although the cause of this potential interaction is not clearly understood, acetaminophen may increase the anticoagulant effect of warfarin. Warfarin is generally used to prevent your blood from "coagulating" or forming blood clots. When acetaminophen 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 risk increases as the dose of acetaminophen is increased. Inform your doctor before taking warfarin with acetaminophen or other over-the-counter pain relievers. Your doctor may want to monitor you closely when therapy with acetaminophen 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.