The favourable impact of surgery for intractable epilepsy on seizures is well documented. However, few studies have determined what changes in antiepileptic drug (AED) therapy occur following surgery. Alterations in AED blood levels in the immediate postoperative period can result in breakthrough seizures. In long term follow-up, one-third to one-half of seizure-free patients after temporal lobectomy, the most common type of epilepsy surgery, still require AED treatment which usually has been reduced from polytherapy to monotherapy. In our study of 93 patients followed two years after temporal lobectomy, polytherapy decreased from 78% before surgery to 14% postoperatively, while medication was discontinued in 44%. Early reduction from polytherapy to monotherapy can often be carried out in the immediate postoperative period but the most appropriate timing of cessation of AED treatment has yet to be determined. Patients undergoing extratemporal resections and other forms of epilepsy surgery associated with less favourable postoperative seizure control may achieve comparatively less reduction in antiepileptic medication. We generally do not recommend stopping AEDs prior to one year after surgery.

Treatment of chronic conditions often entails trade-offs between benefits and risks or side effects. This is of particular importance in epilepsy. Consequently, assessment of effectiveness must incorporate this trade-off as perceived by the recipient of the intervention, ie., the patient. Measurement of health related quality of life (HRQOL) aims at capturing such patient-centred effects of therapy. Conceptual aspects of HRQOL are described and issues relevant to outcomes of epilepsy surgery are addressed. Finally, practical aspects of measurement in the context of epilepsy surgery are discussed.

Treatment-refractory epilepsy can directly impair psychological adjustment and quality of life. Epilepsy surgery is viewed by the patient as a stressful life event, arrived at after extensive deliberation. It is accompanied by expectations and anxiety for patients and their families. We suggest that the success of epilepsy surgery (as reflected by patient-perceived impact on quality of life) depends not only on reduced seizure frequency, but on personality factors and psychosocial issues. This paper reviews our research on these factors, along with suggestions for psychological assessment (of quality of life, and of personality) and psychological treatment. Studies of quality of life in patients undergoing temporal lobectomy are also examined. Finally, factors leading to the perception of “failed” epilepsy surgery are considered, along with suggested ways to manage such cases.