What should I watch for?
Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse. Visit your doctor or health care professional for regular checks on your progress. Do not stop taking except on your doctor's advice. You may develop a severe reaction. Your doctor will tell you how much medicine to take.
Wear a medical identification bracelet or chain if you are taking this medicine for seizures, and carry a card that describes your disease and details of your medicine and dosage times.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
If you have a heart condition, like congestive heart failure, and notice that you are retaining water and have swelling in your hands or feet, contact your health care provider immediately.
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 has caused reduced sperm counts in some men. This may interfere with the ability to father a child. You should talk to your doctor or health care professional if you are concerned about your fertility.
Women who become pregnant while using this medicine for seizures 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:
Difficult or labored breathing
tightness in the chest
Blistering, peeling, or loosening of the skin
difficulty with swallowing
joint or muscle pain
puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
red skin lesions, often with a purple center
red, irritated eyes
sores, ulcers, or white spots in the mouth or on the lips
unusual tiredness or weakness
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:
bloating or swelling of the face, arms, hands, lower legs, or feet
burning, tingling, numbness or pain in the hands, arms, feet, or legs
change in walking and balance
difficulty having a bowel movement
difficulty with speaking
false beliefs that cannot be changed by facts
lack of coordination
loss of memory
lower back or side pain
painful or difficult urination
problems with memory
rapid weight gain
sensation of pins and needles
trembling, or other problems with muscle control or coordination
unusual weight gain or loss
bloated or feeling of fullness
cool, pale skin
cough producing mucus
decrease or change in vision
excess air or gas in the stomach or intestines
false or unusual sense of well-being
general feeling of discomfort or illness
loss of appetite
loss of bladder control
loss of consciousness
loss of strength or energy
muscle aches, twitching or jerking, or weakness
rhythmic movement of the muscles
uncontrolled eye movements
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.