Drug treatment in patients with newly diagnosed unprovoked seizures/epilepsy

- We crosslink clinical data with drug dispensing data.
- A high proportion of patients received AED treatment within one year after first seizure.
- More than half of patients had the same AED one year after first AED as initially prescribed.

SummaryPurposeThe objective of this study was to analyze drug treatment in patients with newly diagnosed unprovoked seizures/epilepsy in a population-based cohort in Stockholm, Sweden.MethodClinical data from the Stockholm Incidence Registry of Epilepsy was cross-linked with drug dispensing data from the Swedish Prescribed Drug Register to analyze drug treatment in patients diagnosed with unprovoked seizures between 2006 and 2008. Specific questions addressed were the use of other medications at seizures onset, the proportion of patients initiated on different antiepileptic drugs (AEDs) within one year after inclusion, and the extent of switching between different AEDs during the first year.ResultsIn total 367 patients were included. More than 50% had other medications prescribed at date of first seizure. All together, 262 patients received an AED within one year and 257 patients (98%) were initiated on monotherapy. One year after first prescription, 147 patients (56%) remained on the initially prescribed AED and 48 patients (18%) had switched to another AED. Among the remaining patients, 29 (11%) had died and 38 patients (15%) had discontinued AED treatment.ConclusionsA majority of all patients with epilepsy receive treatment within one year. Many patients use other medications and several of them are related to known comorbidities and can also be involved in drug-drug interactions. Nevertheless, most patients remained on the same AED at the end of the first year.