Lamotrigine is an anti-epileptic medication, also called an anticonvulsant. Lamotrigine is used alone or with other medications to treat epileptic seizures in adults and children. Lamotrigine is also used to delay mood episodes in adults with bipolar disorder (manic depression). Immediate-release lamotrigine can be used in children as young as 2 years old when it is given as part of a combination of seizure medications. However, this form should not be used as a single medication in a child or teenager who is younger than 16 years old. Extended-release lamotrigine is for use only in adults and children who are at least 13 years old. Lamotrigine may also be used for purposes not listed in this medication guide.