A 22-year-old man is diagnosed with new-onset focal epilepsy with secondary generalisation. MRI is normal. EEG shows left temporal spikes. Which anti-seizure medication has the BEST evidence as monotherapy for focal epilepsy with fewest drug interactions?
- A Valproate
- B Lamotrigine
- C Carbamazepine
- D Levetiracetam ✓
Explanation
Levetiracetam is a broad-spectrum anti-seizure medication with proven efficacy for focal epilepsy as monotherapy, has a favorable pharmacokinetic profile (no hepatic enzyme induction/inhibition, renal excretion), minimal drug interactions, and good tolerability. SANAD II trial (Lancet 2021) compared levetiracetam, zonisamide, and lamotrigine — lamotrigine had marginally better 12-month seizure freedom in focal epilepsy, but levetiracetam's interaction-free profile makes it highly preferred in patients on other medications. Both levetiracetam and lamotrigine are acceptable first-line agents.
Reference: Harrison's Principles of Internal Medicine, 21st ed.
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Written and medically reviewed by the StethoPrep medical team.