But Dr. Jon Skelton, an emergency room physician at Star ER, warns that a common reason for accidents on the road is unexpected reactions to medication. Dr. Skelton offers this advice, “Whether it’s something as simple as a back strain and you have a muscle relaxer or your doctor is going up on your blood pressure medication, or changing your diabetes medication, see how that’s going to affect you, at least one dose, before you get behind the wheel and drive.”