How are you? Side effects of Warfarin
or coumadin include severe headache, dizziness, fainting, unusual or persistent tiredness, bloody/black/tarry stools, chest pain, shortness of breath,difficulty swallowing and swelling or sudden weight gain. If you observe these symptoms, inform your doctor for proper management.Coumadin can cause serious bleeding and this is the reason your INR should be monitored. Take care and do keep us posted.