"i was on this medication since 2006. i had no side effects or problems. it worked well, we had to keep increasing my dosage on it though. i also combined it with depakote, which apparently raises your lamictal levels. yes you can become toxic on this medication like depakote. i had to get off the medication because i became toxic, i was taking 300mg a day and 1250mg of depakote daily. my symptoms were drunk look, double vision, slurred speech, short term memory loss, i started bumping into walls, my eyes were glazed over. i just got stupid towards the end. i even went to the hospital telling them i was toxic, they did not believe me. it can happen, i guess i became intolerant of the medication."