Telling a patient that they will have to stop driving can be difficult, so it is essential to be sure of the facts on the law regulating driving and chronic disease. When asked what they know about chronic disease and stopping driving, many people may know that epilepsy is an issue, and may mention diabetes. But are driving restrictions for one year, or is it three years? Do they affect only patients with diabetes on insulin, and are some regulations only for heavy goods vehicle (HGV) drivers? In this article, we give you the information to answer these questions.