Lamictal and sex drives

My husband has been taking Lamictal now for 2 years. He had two seizures within 6 mo in his late 30's, one of which resulted in a car crash. Of course he is grateful for such medicine but as a partner and wife, I noticed lots of changes in him after he began the medication. He was irritable, had very low tolerance and a short fuse, was extremely distant and often mean - which in the end caused us to separate for some months. Although we are back together now and our relationship is doing very well, I notice other side effects, for example, he sleeps every time he sits still, etc.

HOWEVER, the real reason I am consulting this forum is to ask anyone (especially men) if they experience side effects related to sex. I know this is a tabu topic but things just aren't working as they used to and I am looking for solutions as he doesn't seem to question the side effects of this drug. This is starting to become an issue psychological issue now as well. Has anyone else experienced lower sex drives and complications during sex?