Rarely, serious (sometimes fatal) skin rashes have occurred while using this medication. These rashes (e.g., Stevens-Johnson syndrome) are more common in children (less than 16 years old) than in adults. Therefore, lamictal should only be used in children who have partial seizures or seizures, associated with Lennox-Gastaut syndrome. Immediately notify your doctor if you develop any type of rash. If this medication is the cause of the rash, the drug must be stopped. Even after stopping this medication, it is still possible for the rash to cause permanent or life-threatening scarring along with other problems. The possibility of a rash may be increased by using too much of this medication when treatment begins, increasing the dose beyond what your doctor prescribes during treatment, or taking valproic acid with lamictal. Most life-threatening rashes have occurred within 2 to 8 weeks of starting this medication. However, such serious rashes have also occurred after 6 months of use. Tell your doctor if you have: other illnesses, heart problems, liver problems, kidney problems, allergies (especially drug allergies). Sunscreen and/or protective clothing is recommended to protect against a possible severe rash, triggered by sunlight. Use caution operating machinery or engaging in activities, requiring alertness. Limit alcohol intake while taking this drug. This medication should be used only if clearly needed during pregnancy. Discuss the risks and benefits with your doctor. This drug is excreted into breast milk. Due to possible risks to nursing infants, breast-feeding while using this drug is not recommended. Consult your doctor.

Headache, fatigue, drowsiness, dizziness, blurred vision, weakness, clumsiness may occur the first several days as your body adjusts to the medication. If any of these effects continue or become bothersome, inform your doctor. If you develop a rash, stop using this drug and seek immediate medical attention. In the unlikely event you have an allergic reaction to this drug, seek immediate medical attention. Symptoms of an allergic reaction include: rash, itching, hives, fever, swollen glands, swelling of the lips or tongue, painful sores in the mouth or around the eyes, severe dizziness, trouble breathing. If you notice other effects, not listed above, contact your doctor or pharmacist.

Laboratory tests may be done periodically while taking this medication to monitor the effects. See your doctor regularly.