What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. Do not stop taking this medicine suddenly. This increases the risk of seizures if you are using this medicine to control epilepsy. Wear a medical identification bracelet or chain to say you have epilepsy or seizures, and carry a card that lists all your medicines.
This medicine can decrease sweating and increase your body temperature. Watch for signs of deceased sweating or fever, especially in children. Avoid extreme heat, hot baths, and saunas. Be careful about exercising, especially in hot weather. Contact your health care provider right away if you notice a fever or decrease in sweating.
You may get drowsy, dizzy, or have blurred vision. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. To reduce dizziness, do not sit or stand up quickly, especially if you are an older patient. Alcohol can increase drowsiness and dizziness. Avoid alcoholic drinks.
If you notice blurred vision, eye pain, or other eye problems, seek medical attention at once for an eye exam.
The use of this medicine may increase the chance of suicidal thoughts or actions. Pay special attention to how you are responding while on this medicine. Any worsening of mood, or thoughts of suicide or dying should be reported to your health care professional right away.
This medicine may increase the chance of developing metabolic acidosis. If left untreated, this can cause kidney stones, bone disease, or slowed growth in children. Symptoms include breathing fast, fatigue, loss of appetite, irregular heartbeat, or loss of consciousness. Call your doctor immediately if you experience any of these side effects. Also, tell your doctor about any surgery you plan on having while taking this medicine since this may increase your risk for metabolic acidosis.
Women who become pregnant while using this medicine may enroll in the North American Antiepileptic Drug Pregnancy Registry by calling 1-888-233-2334. This registry collects information about the safety of antiepileptic drug use during pregnancy.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Any vision problems, especially blurred vision, double vision, eye pain, or rapidly decreasing vision
burning, prickling, or tingling sensations
clumsiness or unsteadiness
continuous, uncontrolled back-and-forth or rolling eye movements
generalized slowing of mental and physical activity
increased eye pressure
speech or language problems
trouble in concentrating or paying attention
unusual tiredness or weakness
Abdominal or stomach pain
lessening of sensations or perception
loss of appetite
mood or mental changes, including aggression, agitation, apathy, irritability, and mental depression
red, irritated, or bleeding gums
Blood in the urine
decrease in sexual performance or desire
difficult or painful urination
loss of bladder control
lower back or side pain
red or irritated eyes
ringing or buzzing in the ears
skin rash or itching
Incidence not known
Blistering, peeling, or loosening of the skin
blisters in the mouth
blisters on the trunk, scalp, or other areas
increased rate of breathing
joint or muscle pain
pain or tenderness in upper abdomen or stomach
red skin lesions, often with a purple center
sores, ulcers, or white spots in the mouth or on the lips
yellow eyes or skin
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Decreased awareness or responsiveness
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.