Lamotrigine is a prescription medication which is available both as a generic and under the brand name Lamictal. Despite the availability of a generic formulation, some doctors and pharmacists prefer the brand name due to subtle differences. No one is exactly sure how this anticonvulsant works, but it is believed to calm excitable, overactive neurons in the brain that can lead to a seizure. Lamotrigine is most commonly used in the treatment of partial seizures and Lennox-Gastaut syndrome, a severe type of childhood-onset epilepsy. It can also be used in conjunction with other medications to treat bipolar disorder. Lamictal is available in regular tablets from 25 to 200 milligrams, and in chewable tablets of 2 to 25 milligrams. Generic lamotrigine is only available in this chewable preparation. Lamotrigine should be taken with a full glass of water according to your doctor's instructions. Do not suddenly stop taking this medication, as seizures or bipolar disorder can return quickly. The most commonly reported side effects of lamotrigine include dizziness, headache, or nausea, but please ask your doctor for a complete list. Also, tell your doctor IMMEDIATELY if you experience a rash, fever, swelling of the lips and tongue, or any other significant changes. Lamotrigine may be less effective if taken in conjunction with birth control pills and should be used cautiously in conjunction with sedatives. Ask your doctor for a full list of medications and conditions that should not be combined with lamotrigine. Lamictal can be effective at preventing certain types of seizures. However, this medication must always be used under the direct care of a physician. Please ask for and review all of the patient information provided by your doctor before taking lamotrigine.