I've been taking lamotrigine tablet for my epilepsy for about a year now and i have a extremely bad memory since i've been diagnosed, why is this?

Memory: Please speak to your neurologist regarding your concerns. Are your seizures under good control? Is your mood good? Memory and cognitive complaints are not uncommon in individuals with epilepsy, and Lamictal is generally thought to be pretty friendly from this standpoint. However it sounds as this is really bothering you and you should speak to your physician to clarify the severity and cause.