Lamotrigine affects EEG results, right?

I recently saw a new neurologist because I've moved to a new city.  My first impression is quite negative.  Amongst other things, he openly questioned my former neurologist, which I was quite pleased with.  He wants to send me for another EEG because he has doubts about whether my former neurologist correctly interpreted the results.  I asked him if the fact that I'm on Lamotrigine would skew the results.  He said that Lamotrigine doesn't affect EEG results.

Admittedly I'm no neurologist, but this doesn't seem right.  Can anyone shed some light on this?  Thanks.