SIDE EFFECTS: 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.

PRECAUTIONS: 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 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.

DRUG INTERACTIONS: Tell your doctor of any over-the-counter or prescription medication you use, especially of: other medications for seizures (e.g., phenytoin, carbamazepine, valproic acid, phenobarbital, primidone). Do not start or stop any medicine without doctor or pharmacist approval.

OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US national poison hotline at 1-800-222-1222. Canadian residents should call their local poison control center directly. Symptoms of overdose may include unusual dizziness, severe headache, unusual sleepiness, and loss of consciousness.