Lamotrigine (Lamictal) is an inexpensive drug used to control seizures in adults and children with epilepsy and Lennox-Gastaut syndrome. This drug is slightly more popular than comparable drugs. It is available in brand and generic versions. It is covered by most Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower. Get Lamotrigine for as low as $3.58, which is 93% off the average retail price of $54.93 for the most common version, by using a GoodRx coupon.