Warfarin Sodium I was taking warfarin for about 2 months 8 mg daily due to a blood clot in my left arm, i also have witnessed headaches, dizziness, always tired and fatigue. I also told the doctor about all this and he said it's not the medicine, I don't know what else it could of been because i wasn't taking any other medication. my life remained the same as previous with the exception of the warfarin. Anyway, i discontinued taking the medication because it was killing me to take it. I will now have to take my chances.