Quick Overview
Epilepsy affects 0.5-1% of children, defined as ≥2 unprovoked seizures >24 hours apart or 1 seizure with high recurrence risk. NICE NG217 provides evidence-based guidance on classification, treatment selection by seizure type, and emergency management. Correct seizure classification determines appropriate antiepileptic drug (AED) choice-misclassification leads to treatment failure or seizure exacerbation.
Core Facts & Concepts
Seizure Classification (ILAE 2017)
| Seizure Type | Key Features | First-Line AED |
|---|---|---|
| Focal onset | Aware/impaired awareness, motor/non-motor | Carbamazepine or Levetiracetam |
| Generalised tonic-clonic | Loss of consciousness, tonic then clonic phase | Sodium valproate (males), Lamotrigine or Levetiracetam (females) |
| Absence | Brief (<10s) staring, abrupt onset/offset | Ethosuximide or Sodium valproate (males) |
| Myoclonic | Brief muscle jerks, consciousness preserved | Sodium valproate (males), Levetiracetam (females) |
| Tonic/Atonic | Sudden stiffening or loss of tone | Specialist referral required |

💊 Sodium Valproate Restrictions (Pregnancy Prevention Programme)
- Contraindicated in females of childbearing potential unless conditions met
- Must use ≥1 effective contraception, annual risk acknowledgement form
- Teratogenic risk: 10% major congenital malformations, 30-40% neurodevelopmental disorders
📊 Key Numbers
- Status epilepticus definition: ≥5 minutes continuous seizure or ≥2 seizures without recovery
- Treatment threshold: After 5 minutes of seizure activity
- Refer to paediatric neurology: Diagnosis confirmation, treatment failure, <1 year age
Problem-Solving Approach
Status Epilepticus Emergency Protocol
- 0-5 minutes: ABCDE assessment, high-flow oxygen, check glucose, position safely
- 5 minutes: Buccal midazolam 0.5mg/kg (max 10mg) OR IV lorazepam 0.1mg/kg (max 4mg)
- 10 minutes (if continuing): Repeat benzodiazepine (same dose)
- 15 minutes: Call senior help, prepare IV phenytoin 20mg/kg or IV levetiracetam 40mg/kg
- 25 minutes: Second-line IV AED, consider ICU transfer

🚩 Red Flags for Urgent Referral
- Focal neurological signs post-ictally (>Todd's paresis duration)
- Developmental regression or loss of skills
- Myoclonic seizures in infancy (consider infantile spasms-hypsarrhythmia on EEG)
- Seizures <6 months age (structural/metabolic cause likely)
Rescue Medication (Home Management)
- Buccal midazolam: First-line, 0.5mg/kg (1-3 months: 2.5mg; 3-12 months: 2.5mg; 1-5 years: 5mg; 5-10 years: 7.5mg; 10+ years: 10mg)
- Give after 5 minutes of seizure, call ambulance if no response in 5 minutes
Analysis Framework
AED Selection Decision Tree
When to Avoid Specific AEDs
| AED | AVOID in | Reason |
|---|---|---|
| Carbamazepine | Generalised epilepsies, myoclonic/absence | May worsen seizures |
| Sodium Valproate | Females (unless no alternative) | Teratogenicity, neurodevelopmental risk |
| Phenytoin | Routine use | Narrow therapeutic index, cosmetic effects |
| Lamotrigine | Myoclonic seizures | May exacerbate myoclonus |
Key Points Summary
✓ Epilepsy diagnosis: ≥2 unprovoked seizures >24h apart; seizure classification determines AED choice
✓ Status epilepticus: Treat after 5 minutes-buccal midazolam 0.5mg/kg or IV lorazepam 0.1mg/kg
✓ Sodium valproate: Most effective for generalised epilepsies but contraindicated in females of childbearing potential (10% teratogenicity)
✓ Focal seizures: Carbamazepine or levetiracetam first-line; never use carbamazepine for generalised epilepsy
✓ Absence seizures: Ethosuximide first-line; brief (<10s) staring with 3Hz spike-wave on EEG
✓ Refer to specialist: All new diagnoses, treatment failure, age <1 year, diagnostic uncertainty
✓ Rescue medication: Buccal midazolam at 5 minutes, call ambulance if no response by 10 minutes total
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