Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 11/27/2025

Antiepileptic Medication Considerations

First-Line Treatment Options

  • The American Society of Clinical Oncology recommends levetiracetam and lamotrigine as preferred first-line options due to their efficacy and favorable tolerability profiles 1
  • Lamotrigine has good antiseizure activity but requires several weeks to reach sufficient drug levels 1
  • Lacosamide may assume a larger role as add-on treatment for patients whose seizure disorder is not controlled by monotherapy 1
  • Valproate still has a firm place in some centers given its efficacy and overall good tolerability, but must not be used in females who may become pregnant 1

Medications to Avoid

  • Enzyme-inducing anticonvulsants, such as phenytoin, phenobarbital, and carbamazepine, should be avoided in patients with brain tumors and those requiring multiple medications due to their side-effect profile and drug interactions 1

Special Considerations

  • Levetiracetam is considered safer in patients with brain tumors requiring concomitant medications due to its low interaction with cytochromes 2
  • Antiepileptic therapy appears safe during immunotherapy but can interact with targeted therapy, with the exception of levetiracetam 2