Tell the EMG doctor if you are taking aspirin, blood thinners (like Coumadin), have a pacemaker, or have hemophilia. Take a bath or a shower to remove oil from your skin. Do not use body lotion on the day of the test. If you have myasthenia gravis, ask your EMG doctor if you should take any medications before the test. It is helpful if you bring clothes to change into so that you can be examined by the doctor (i.e. shirt if it is a hand problem, shorts if it is a leg problem).