Known interactions between the following drugs: Coumadin, Crestor

Rosuvastatin 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 rosuvastatin 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. If these drugs are taken together, your doctor may want to monitor you closely when therapy with rosuvastatin 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.