Alternatives to Keppra If You Can't Fill Your Prescription

Keppra (levetiracetam) is one of the most widely used anti-seizure medications in the world, but localized stock gaps can leave patients in a difficult position. If your pharmacy is out of levetiracetam and you cannot locate it nearby, your neurologist may consider temporarily or permanently switching to an alternative medication.

Important: Never stop taking Keppra or switch to a different seizure medication without guidance from your doctor. Abrupt discontinuation of any anti-seizure medication can trigger breakthrough seizures. The information below is intended to inform your conversation with your neurologist — not to guide self-treatment.

Why Is Switching Seizure Medications Complicated?

Anti-seizure medications (ASMs) don't all work the same way. Levetiracetam's unique mechanism — binding to synaptic vesicle protein SV2A — is different from most other ASMs, which work by blocking sodium channels or enhancing GABA activity. A medication that works well for one seizure type may not work for another, and each patient's seizure profile, side effect history, and other medications factor into which alternative is appropriate.

Additionally, anti-seizure medications are considered "narrow therapeutic index" drugs — small changes in dose or formulation can affect seizure control. Any switch should be supervised by your neurologist and done gradually when possible.

Brivaracetam (Briviact): The Closest Relative to Keppra

Brivaracetam (brand name Briviact) is a chemical analogue to levetiracetam and works through the same SV2A mechanism. It has 15–30 times higher affinity for the SV2A protein than levetiracetam and is associated with fewer psychiatric side effects (such as irritability and aggression) — a common complaint with Keppra. It is FDA-approved for focal-onset seizures in adults and children 4 years and older. The main drawback is cost: brivaracetam is brand-only and considerably more expensive than generic levetiracetam.

Lamotrigine (Lamictal): A Widely Used Broad-Spectrum Option

Lamotrigine (brand name Lamictal) is one of the most commonly prescribed anti-seizure medications and is effective for focal-onset, tonic-clonic, and absence seizures. It works by blocking voltage-gated sodium channels. Studies have shown it may be particularly effective for generalized epilepsy — one study found lamotrigine had the highest response rate (89.6%) for generalized epilepsy among commonly used add-on AEDs. Generic lamotrigine is widely available and relatively affordable.

The key drawback of lamotrigine is that titration must be very slow — dose increases too fast can cause a serious skin reaction called Stevens-Johnson syndrome. A switch from levetiracetam to lamotrigine is not an overnight process; it requires weeks of overlap and gradual dosing.

Valproic Acid / Valproate (Depakote): First-Line for Generalized Epilepsy

Valproic acid (brand names Depakote, Depakene) works through multiple mechanisms and is considered first-line treatment for generalized epilepsy, including juvenile myoclonic epilepsy (JME). Since Keppra is also first-line for JME, valproate is a natural alternative for patients who cannot tolerate or access levetiracetam. However, valproate has significant teratogenic risks and is strongly contraindicated in pregnancy. It also has more drug interactions and requires blood level monitoring.

Oxcarbazepine (Trileptal): Good for Focal Seizures

Oxcarbazepine (brand name Trileptal) is a sodium channel blocker used for focal-onset seizures. It's a good option for patients on Keppra specifically for partial-onset seizures, though it's less effective for generalized seizure types. Research suggests oxcarbazepine has an 88.9% response rate for focal epilepsy as add-on therapy. Generic oxcarbazepine is widely available, though some strengths have experienced sporadic stock gaps in recent years.

Topiramate (Topamax): Broad Spectrum with Significant Side Effects

Topiramate (brand name Topamax) works through multiple mechanisms and is approved for both focal and generalized seizures. While effective, it's known for cognitive side effects — patients often describe it as making them feel "foggy" or having word-finding difficulty. It's also a teratogen and is subject to a Pregnancy Prevention Programme for women of childbearing age in many countries. It is generally considered a second-line alternative.

What to Tell Your Doctor If Keppra Is Unavailable

When you call your neurologist about a levetiracetam shortage, be ready to provide:

Your current dose and formulation (e.g., 500 mg twice daily, immediate-release)

How many days of medication you have remaining

Which pharmacies you've already checked (and which strengths they do have in stock)

Your seizure type and current seizure control status (e.g., seizure-free for 18 months)

Any prior medications that didn't work or caused problems

The Bottom Line

There are several viable alternatives to Keppra depending on your seizure type and medical history, but switching ASMs should never be done without medical supervision. Before exploring alternatives, make sure you've exhausted options to find levetiracetam — medfinder can help locate nearby pharmacies with stock. If you truly cannot find it, read our guide on how to find Keppra in stock near you before calling your doctor.