Automobile driving is essential to work and leisure for many people, and patients with implantable cardioverter defibrillators (ICDs) are no exception. Whether patients who may suffer sudden incapacitation should be allowed to drive raises important ethical and legal issues. The opinion of physicians regarding when or if it is safe to drive with an ICD varies, and most countries have no regulations to assist such decisions. Such regulations can best be developed by actuarial analysis of the risks involved, although the limited volume of published data on the ICD hinders this process. A policy based on very low levels of social risk from driving by patients with ICDs or a comparison with epileptic patients suggests a ban on driving for 12 to 24 months after ICD implantation. Patients who have received therapy from the ICD within this period would not be granted a driver's licence. As further data from actuarial studies become available, these guidelines could be relaxed for patients at low risk of therapy delivery.