Ethosuximide (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:

• Changes in behavior
• Discouragement
• Feeling sad or empty
• Irritability
• Lack of appetite
• Loss of interest or pleasure
• Mood or mental changes
• Thoughts of killing oneself
• Tiredness
• Trouble with concentrating
• Trouble with sleeping

• Attack, assault, or force
• Blistering, peeling, or loosening of the skin
• Blood in the urine
• Bloody, black, or tarry stools
• Chest pain
• Cough or hoarseness
• Diarrhea
• Enlarged gums
• False or unusual sense of well-being
• Fever and chills
• Fever with or without chills
• General feeling of discomfort or illness
• General feeling of tiredness or weakness
• Hair loss
• Headaches
• High fever
• Hives
• Itching
• Joint or muscle pain
• Lower back or side pain
• Nervousness
• Not able to concentrate
• Painful or difficult urination
• Pale skin
• Red skin lesions, often with a purple center
• Red, irritated eyes
• Restlessness
• Shakiness and unsteady walk
• Shortness of breath
• Skin rash
• Sore throat
• Sores, ulcers, or white spots on the lips or in the mouth
• Swelling around the eyes
• Swelling of the tongue
• Swollen, painful, or tender lymph glands in the neck, armpit, or groin
• Trouble sitting still
• Trouble with breathing
• Unexplained bleeding or bruising
• Unsteadiness, trembling, or other problems with muscle control or coordination
• Unusual bleeding or bruising
• Unusual tiredness or weakness
• Vaginal bleeding
• Vision changes
• Yellow eyes or skin

Get emergency help immediately if any of the following symptoms of overdose occur:

• Change in consciousness
• Irregular, fast or slow, or shallow breathing
• Loss of consciousness
• Pale or blue lips, fingernails, 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:

• Increased in sexual ability, desire, drive, or performance
• Increased interest in sexual intercourse

• Cramps
• Dizziness
• Drowsiness
• Heartburn
• Hiccups
• Increased hair growth, especially on the face
• Loss of appetite
• Nausea or vomiting
• Nearsightedness
• Pain or discomfort in the chest, upper stomach, or throat
• Redness of the skin
• Sleeplessness
• Unable to sleep
• Unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
• Weight loss

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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