All patients should be asked about risk factors for seizures: Prior head trauma or CNS infection Known neurologic disorders Drug use or withdrawal, particularly of recreational drugs Alcohol withdrawal Nonadherence to antiseizure drugs Family history of seizures or neurologic disorders Patients should also be asked about rare triggers (eg, repetitive sounds, flashing lights, video games, touching certain parts of the body) and about sleep deprivation, which can lower the seizure threshold.