Epilepsy and attention deficit and hyperactivity disorder (ADHD) are frequent conditions in pediatrics. Their association is frequent and complex, often sharing psychiatric comorbidity. Patients who present epilepsy and ADHD, show equal frequency in both genders, with the inattentive type, as predominant presentation. Cognitive deficit increases the risk of associating ADHD in patients with epilepsy. There is not enough evidence for other risk factors, however there is enough information that allows to ant icipate its presence in some types of epilepsy, with neuropsychological models that evidence the underlying network dysfunction. The relationship with frequency and seizure control, electroencephalographic alterations and antiepileptic drugs (AEDs) is also reviewed. Recommendations to reduce adverse effects of AEDs are described. The diagnosis must therefore be based on suspicion, through clinical instruments and assessments of cognitive functioning. Multimodal treatment is also recommended in patients with ADHD with and without epilepsy. Psych stimulants can be used safely. The quality of life of the patients and their families is affected, so it is advisable for them to be supported by a specialized team that could provide education, early assessment and therapy. If they are omitted, the consequences can be negative at school, social environment and emotional development, which could be relevant and become persistent.