Coumadin is a commonly used medication to prevent blood clots from forming. It is often prescribed to patients with heart arrhythmias; however, coumadin can be a dangerous medication because it increases the risk of hemorrhage and, therefore, requires careful monitoring. Blood testing should be done frequently to measure the level of anticoagulation. Patients should also know that changes in diet and some commonly prescribed antibiotics, such as Levaquin, can drastically alter the effects of anti coagulation and lead to hemorrhage. Patients should always contact their doctors to discuss any medication changes in order to prevent hemorrhage.
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