I et forsøg, hvor raske frivillige fik både felbamat (1. 200 mg to gange dagligt) og lamotrigin (100 mg to gange dagligt i 10 dage), havde den samtidige administration tilsyneladende ingen klinisk relevant effekt på lamotrigins farmakokinetik.
In a study of healthy volunteers, coadministration of felbamate (1200 mg twice daily) with lamotrigine (100 mg twice daily for 10 days) appeared to have no clinically relevant effects on the pharmacokinetics of lamotrigine.