The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
The following side effects were reported in adults taking this medication in addition to other antiepileptics.
- Headache (37%)
- Nausea (34%)
- Drowsiness (19%)
- Low appetite (19%)
- Dizziness (18%)
- Difficulty sleeping (18%)
- Tiredness (17%)
- Vomiting (17%)
- Indigestion (12%)
- Constipation (11%)
Side effects might be different for children or for adults taking this medication by itself.
Less Common Side Effects
- Diarrhea
- Stomach pain
- Uncontrollable shaking
- Difficulty walking
- Difficulty with movement or coordination
- Nervousness
- Anxiety
- Depression
- Double or changes in vision
- Change in how food tastes
Felbamate serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Low blood cell counts: getting infections more than usual, unusual bruising or bleeding (or red or purple spots on your body), feeling very tired or weak
- Liver injury: severe nausea, vomiting, right-sided stomach pain, fatigue, low or no appetite, yellowing of the skin or eyes
- Thoughts of hurting yourself or of suicide
Source: DailyMed
The following Felbamate side effects have also been reported
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:
More common
Black, tarry stools
chills
confusion
delusions
loss of bladder control
painful or difficult urination
purple or red spots on the skin
shakiness in the legs, arms, hands, or feet
shortness of breath
sores, ulcers, or white spots on the lips or in the mouth
swollen glands
trembling or shaking of the hands or feet
unusual bleeding or bruising
unusual tiredness or weakness
Less common
Agitation, aggression, or other mood or mental changes
bladder pain
bloody or cloudy urine
bone pain
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
clumsiness or unsteadiness
frequent urge to urinate
loss of appetite
lower back or side pain
skin rash
swelling or puffiness of the face
trouble with breathing
unsteadiness, trembling, or other problems with muscle control or coordination
Rare
Continuing headache
continuing stomach pain
continuing vomiting
dark-colored urine
general feeling of tiredness or weakness
light-colored stools
muscle cramps
nosebleeds or other unusual bruising or bleeding
sensitivity of the skin to sunlight
swollen or painful glands
tightness in the chest
yellow eyes or skin
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:
More common
Acid or sour stomach
bad, unusual, or unpleasant (after) taste
belching
body aches or pain
change in taste
change in walking and balance
constricted, pinpoint, or small pupils (black part of the eye)
crying
depersonalization
difficulty having a bowel movement (stool)
difficulty with sleeping
dizziness
double vision
dysphoria
ear congestion
euphoria
headache
hiccup
indigestion
loss of appetite
loss of voice
paranoia
quick to react or overreact emotionally
rapidly changing moods
seeing double
sleepiness or unusual drowsiness
stomach discomfort, upset, or pain
trouble sleeping
unable to sleep
Less common
Blemishes on the skin
blurred vision
decreased awareness or responsiveness
decreased weight
difficulty with moving
hoarseness
joint pain
muscle aching or cramping
muscle pains or stiffness
pain or tenderness around the eyes and cheekbones
redness or swelling in the ear
severe sleepiness
swollen joints
tender, swollen glands in the neck
trouble with swallowing
voice changes
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.
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