Yes, Keppra (levetiracetam) can be safely prescribed together with lamotrigine.
The combination of levetiracetam and lamotrigine is not only safe but may be particularly effective, with no clinically significant drug interactions between these medications. 1
Drug Interaction Profile
The FDA label for Keppra explicitly addresses this combination and provides reassuring data:
- Levetiracetam does not affect lamotrigine plasma concentrations 1
- Lamotrigine does not influence levetiracetam pharmacokinetics 1
- Levetiracetam is not metabolized through cytochrome P450 enzymes and circulates largely unbound (<10% protein binding), making pharmacokinetic interactions with other antiepileptic drugs unlikely 1
These findings were confirmed through pharmacokinetic screening in placebo-controlled clinical studies evaluating serum concentrations of both medications when used together 1.
Clinical Evidence Supporting the Combination
Beyond safety, emerging evidence suggests this combination may offer enhanced efficacy:
A 2025 study demonstrated that lamotrigine combined with levetiracetam improved seizure control and EEG outcomes compared to lamotrigine monotherapy, with reductions in inflammatory markers and brain injury markers, without increasing adverse reactions 2
A 2006 observational study found lamotrigine was used significantly more often in combination with levetiracetam in patients who responded well (became seizure-free) compared to non-responders (p = 0.003), suggesting a possible beneficial pharmacodynamic interaction 3
Preclinical data from 2009 showed that levetiracetam enhances the protective activity of many other antiepileptic drugs without exacerbating side effects or causing pharmacokinetic interactions 4
Guideline Support
The American Academy of Neurology and American Epilepsy Society guidelines recognize both levetiracetam and lamotrigine as appropriate for adjunctive treatment of refractory partial seizures, supporting their use in combination therapy 5.
Practical Considerations
No dose adjustments are required when combining these medications 1. The combination appears well-tolerated, with a 2025 study showing comparable adverse event rates between lamotrigine monotherapy and the combination 2.
One caveat: A 2025 real-world study noted that cognitive side effects (sleepiness, difficulty concentrating, memory problems) were prominent across dual antiepileptic drug combinations, though the levetiracetam/lamotrigine combination was among the most commonly used and was not specifically associated with higher adverse event burden compared to other combinations 6.
In summary, prescribe this combination confidently—it is safe, supported by FDA labeling data, and may offer synergistic benefits for seizure control.