In these countries, it is common for people with epilepsy to hide their condition from authorities in order not to be denied a driver's license.[5] Other places allow those who have had seizures to drive after a seizure-free period, which ranges from months to years. EU (European Union) harmonisation of periods of freedom from seizure means the periods shown below for EU states is wrong - now 6 months for an isolated seizure, 12 months for a second or more seizures within 5 years, whether or not antiepileptic drugs are taken. For drivers of heavy lorries & buses the seizure free period is 5 yrs without drugs.