It is very important that your doctor check you or your child's progress at regular visits to make sure this medicine is working properly.
If you or your child develop any unusual or strange thoughts and behavior while taking this medicine, be sure to discuss it with your doctor. Some changes that have occurred in people taking this medicine are like those seen in people who drink too much alcohol. Other changes might be confusion, worsening of depression, hallucinations (seeing, hearing, or feeling things that are not there), suicidal thoughts, and unusual excitement, nervousness, or irritability.
This medicine may cause some people to become dizzy, drowsy, lightheaded, clumsy, unsteady, or less alert than they are normally. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are not alert or able to think or see well.
This medicine may cause serious allergic reactions that may affect several parts of the body (e.g., liver or kidneys). Check with your doctor right away if you or your child have more than one of the following symptoms: fever, dark-colored urine, headache, rash, itching, extra fluid around the face, stomach pain, unusual tiredness, or yellow eyes or skin.
Do not stop taking this medicine without checking first with your doctor. Your doctor may want you to gradually reduce the amount you are using before stopping it completely.
Birth control pills may not work as well while you are using this medicine. To keep from getting pregnant, use another form of birth control together with your birth control pills. Other forms include condoms, diaphragms, or contraceptive foams or jellies.
Tell your doctor if you become pregnant while taking this medicine. Your doctor may want you to join the North American Antiepileptic Drug Pregnancy Registry. The registry is used by pregnant patients who are taking this medicine.
Avoid drinking alcohol while taking this medicine.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.