Epilepsy can have diverse and complex effects on the overall well-being or subjective quality of life (QOL) of its sufferers. Cognitive outcomes influence the quality of life of these patients. Complex interaction between cognitive deficits and QOL, defending that the relationship between them should be assessed when one is treating Epilepsy patients. In this context it is worth stressing that: (a) in many individuals with Epilepsy QOL is more negatively affected by treatment side-effects than by the seizures themselves; and that (b) both the Epilepsy and its treatment can negatively affect cognition. The impact of epilepsy on a person's quality of life (QOL) may be significant because of profound adverse social, physical, and Psychological consequences of epilepsy and its treatments.