Focal seizures generally respond to a wider range of anti-seizure medications than generalised seizures do. Commonly used first choices include lamotrigine, levetiracetam, oxcarbazepine and carbamazepine, with the decision shaped by side effect profile and interactions. Confirming focal onset genuinely widens the options, since several agents effective here can worsen certain generalised seizure types.
Focal seizures generally respond to a wider range of anti-seizure medications than generalised seizures do. Commonly used first choices include lamotrigine, levetiracetam, oxcarbazepine and carbamazepine, with the decision shaped by side effect profile and interactions. Confirming focal onset genuinely widens the options, since several agents effective here can worsen certain generalised seizure types.
Several medications that are effective in focal-onset seizures can worsen certain generalised seizure types, so confirming that seizures are focal in origin genuinely expands what can be used. Carbamazepine and oxcarbazepine are examples: useful in focal epilepsy, potentially unhelpful in some generalised syndromes. That is one practical reason EEG and a careful description of the episodes matter before treatment rather than after.
With several reasonable options, the deciding factors are usually side effect profile and interactions rather than efficacy. Levetiracetam has few interactions but can affect mood and irritability in some people, which is worth knowing in advance and reporting rather than tolerating. Lamotrigine is generally well tolerated but must be increased slowly because of rash risk. Carbamazepine and oxcarbazepine interact with a number of other drugs including hormonal contraception.
If two appropriately chosen and adequately dosed medications have not controlled seizures, adding a third has a lower chance of success and the situation is described as drug-resistant. The first step is usually revisiting the diagnosis with prolonged EEG, since some episodes that look like focal seizures are not. Focal epilepsy is also where surgical evaluation is most likely to be worthwhile, and that assessment happens at a specialised centre; this practice performs no surgery.
Clinical Neurology Specialists has been physician-owned since 1998, when Leo Germin, M.D., FAANEM founded it. Five board-certified neurologists and four advanced practice providers see patients at the Las Vegas and Henderson offices, each with its own AANEM-accredited electrodiagnostic laboratory.
Clinical Neurology Specialists is an adult outpatient neurology practice for patients 18 and older. The practice performs no surgery and operates no imaging suite, infusion suite or interventional pain programme, and provides no emergency or inpatient care.
Physician-reviewed. Reviewed by the physicians of Clinical Neurology Specialists — board-certified neurologists, AANEM-accredited electrodiagnostic laboratories, physician-owned since 1998. Reviewed 1 August 2026. This article is general education for adults 18 and older and is not a substitute for a consultation.
Sources and further reading: MedlinePlus: epilepsy; MedlinePlus: electroencephalogram (EEG); American Academy of Neurology.
Adults 18 and older, at the Las Vegas and Henderson offices. Call 702-804-1212 or request an appointment online.