Utilization pattern of antiepileptic drugs and their adverse effects in tertiary healthcare and teaching hospital

Abstract

Background: Epilepsy is the most common neurological condition with 65 million cases of active epilepsy found worldwide. The incidence is approximately 0.3 - 0.5% in different world populations with a prevalence rate of five to ten per thousand people. The aim of the present study was to evaluate the prescriptions according to WHO/INRUD drug use indicators and to study the adverse effects to antiepileptic drugs (AEDs).Methods: A cross sectional survey based observational study of 1year duration was conducted at tertiary healthcare hospital. Prescription data of patients (n=361) with Epilepsy from Neurology department was analysed using WHO indicators. The demographic data, type of seizures, AEDs prescribed and adverse drug reactions (ADRs) reported by the patients were recorded. Statistical analysis was done using Microsoft excel 2013.Results: A total of 593 AEDs were prescribed to 361 patients. Average number of AEDs prescribed per prescription was 1.65±0.78 (S.D) with only 02% of newer AEDs. Generalized Tonic Clonic (GTC) was the most common seizure with 55.68%. Phenytoin (32%) was commonly prescribed followed by valproate for GTCS. Carbamazepine was commonly prescribed for partial seizures. Out of 15 ADR cases that has been recorded, phenytoin (73%) was associated with most ADRs followed by valproate (20%). 53% patients were on Monotherapy, 31% on dual drug therapy.Conclusions: Older AEDs are still commonly prescribed drugs. Prescription of newer AEDs to be encouraged, as study revealed majority of adverse effects to drugs like phenytoin and valproate. Study concludes the need of creating awareness of reporting of adverse event to AEDs, in treating physician.