FIRES Requires Long-Term Maintenance Antiseizure Medication
Yes, children with FIRES (Febrile Infection-Related Epilepsy Syndrome) absolutely require maintenance antiseizure medication, as this condition evolves into chronic, refractory epilepsy in virtually all survivors.
Critical Distinction: FIRES is NOT Simple Febrile Seizures
The provided guidelines 1, 2 address simple febrile seizures, which are benign, self-limited events that do not require maintenance therapy. FIRES is a completely different entity and represents a catastrophic epileptic encephalopathy. This is a critical pitfall—confusing FIRES with simple febrile seizures would lead to dangerous undertreatment.
Why Maintenance ASMs Are Mandatory in FIRES
The Natural History Demands Treatment
- Evolution to chronic epilepsy occurs without a silent period 3—seizures transition directly from the acute refractory status epilepticus phase to ongoing chronic epilepsy
- 67-100% of survivors develop drug-resistant epilepsy that persists long-term 3, 4, 5
- At 5-17 year follow-up, all survivors in one cohort continued to have refractory seizures requiring multiple ASMs 3
- Seizures cluster every 2-4 weeks in the chronic phase and remain multifocal 4
The Seizure Burden is Severe
Recent data from 2025 shows that at median 37-month follow-up, epilepsy remained poorly controlled in 67% of survivors despite aggressive treatment 5. In another 2025 cohort, epileptiform activity persisted in 100% of patients during the chronic phase, with multifocal spikes and slow waves in 94.7% 6.
Practical Management Algorithm
Acute Phase (First 4 Weeks)
- Multiple ASMs are required during status epilepticus management
- Median of 7 ASMs are typically tried 5
- Pharmacologic coma is needed in virtually all cases 5
Transition to Chronic Phase
- Continue multiple ASMs as seizures persist without remission
- Most patients require polytherapy (2-4 ASMs) long-term 3
- Common regimens include combinations of levetiracetam, clobazam, valproate, and newer agents like perampanel 7
Long-Term Maintenance
- Lifelong ASM therapy is the expectation, not the exception
- Seizures remain refractory despite treatment in the majority
- Periodic attempts at medication reduction typically result in seizure worsening
Additional Therapeutic Considerations
Beyond conventional ASMs:
- Ketogenic diet should be considered as adjunctive therapy 5, 8
- Vagus nerve stimulation (VNS) may provide partial benefit, with some response in chronic phase 3, 9
- Perampanel has shown promise in reducing barbiturate dependency and may be valuable for maintenance 7
Prognostic Reality
The outcomes underscore why maintenance therapy is non-negotiable:
- 30% mortality rate 4
- 66-100% of survivors have intellectual disability 4
- Moderate to severe cognitive impairment in the majority 3
- Bilateral hippocampal atrophy commonly develops 7, 6
The question is never whether to use maintenance ASMs in FIRES, but rather which combination of multiple ASMs, along with other modalities, will provide the best seizure control and quality of life for these severely affected children.