A patient's seizures are controlled for two years and they want to stop their medication. The answer isn't simply yes or no — it hinges on principles that apply to every antiepileptic, not just one drug.
Antiepileptic drugs (AEDs) work by stabilizing neuronal membranes, enhancing inhibitory neurotransmission (GABA), or reducing excitatory activity (glutamate). Regardless of the specific agent, universal principles govern safe use. AEDs are never stopped abruptly — sudden discontinuation lowers the seizure threshold and can trigger status epilepticus, a life-threatening emergency. Tapering over weeks to months is required, even when switching agents. Therapeutic drug monitoring guides dosing for narrow-window AEDs; trough levels are drawn just before the next scheduled dose. Most AEDs are hepatically metabolized, creating a high risk for drug-drug interactions — oral contraceptives, warfarin, and other AEDs are classic offenders. Pregnancy requires special planning because many AEDs are teratogenic; folic acid supplementation (often 4 mg/day for women on AEDs) reduces neural tube defect risk. Seizure precautions — padded side rails up, suction at bedside, oxygen available, bed in lowest position — are nursing responsibilities independent of which drug is prescribed. Document seizure type, duration, preceding aura, and postictal state to guide provider decisions on therapy adjustments.
Key Distinctions
Don't confuse seizure precautions (preventive environmental setup) with seizure management (positioning, timing, protecting airway during an event). Students often think a subtherapeutic drug level means the patient is non-adherent — but drug interactions or increased metabolism (e.g., pregnancy) can drop levels in a fully adherent patient. Trough levels are drawn before the dose, not at peak.
Clinical Pearl
Never stop, always taper. Abrupt AED withdrawal is the fastest route to status epilepticus — treat every discontinuation conversation as a tapering conversation.