Felbamate (Oral Route)

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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:

• Black, tarry stools
• Chest pain
• Chills
• Confusion
• Cough
• Delusions
• Dementia
• Depression
• Fever
• 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
• Sore throat
• 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

• 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

• Continuing headache
• Continuing stomach pain
• Continuing vomiting
• Dark-colored urine
• General feeling of tiredness or weakness
• Hives or itching
• Light-colored stools
• Muscle cramps
• Nasal congestion
• Nosebleeds or other unusual bruising or bleeding
• Pain
• 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:

• 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
• Diarrhea
• Difficulty having a bowel movement (stool)
• Difficulty with sleeping
• Dizziness
• Double vision
• Dysphoria
• Ear congestion
• Euphoria
• Headache
• Heartburn
• Hiccup
• Indigestion
• Loss of appetite
• Loss of voice
• Nausea
• Paranoia
• Quick to react or overreact emotionally
• Rapidly changing moods
• Runny nose
• Seeing double
• Sleepiness or unusual drowsiness
• Sleeplessness
• Sneezing
• Stomach discomfort, upset, or pain
• Trouble sleeping
• Unable to sleep
• Weight loss

• Blemishes on the skin
• Blurred vision
• Decreased awareness or responsiveness
• Decreased weight
• Difficulty with moving
• Earache
• Hoarseness
• Joint pain
• Muscle aching or cramping
• Muscle pains or stiffness
• Pain or tenderness around the eyes and cheekbones
• Pimples
• 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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