Any time a doctor suggests a new prescription, be sure to talk about what other medicines, supplements, herbs, and vitamins are already being taken. Sometimes one kind of medicine changes the way another kind of medicine works in the body. If two kinds of medicine affect each other, the doctor may prescribe something else or change the amount to be taken.

In clinical trials, Vimpat did not appear to have significant interactions with other antiepileptic drugs, contraceptives or several other tested medications. However, this does not rule out drug interactions in individual patients.