and have to go to th hospital every now and Iam65 years of age and weigh 21stone.Ialso have an irregular heart beat which I take warfarin every day and also have to go to the hospital for blood checks                                                             .
Hello, Its safe and should be taken if chadsvasc score is 2 or more, your doctor must have determined this prior to starting it.  It makes blood thin and prevent formation of blood clots and thereby preventing stroke, so it should be taken. Also, to know the adequacy of blood thinning you need to have INR testing frequently.  You can also be started on medicine like tab dabigatran or rivaroxaban if you are not having any valve problems. So you discuss this with your local doctor.