Health Library: ABCDEFGHIJKLMNOPQRSTUVWXYZ

Methsuximide Oral capsule

What is this medicine?

METHSUXIMIDE (meth SUX i mide) is used to control seizures in certain types of epilepsy.

How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Take your doses at regular intervals. Do not take your medicine more often than directed. Do not stop taking this medicine suddenly. This increases the risk of seizures. Your doctor will tell you how much medicine to take. If your doctor wants you to stop the medicine, the dose will be slowly lowered over time to avoid any side effects.

A special MedGuide will be given to you by the pharmacist with each new prescription and refill. Be sure to read this information carefully each time.

Talk to your pediatrician regarding the use of this medicine in children. While this medicine may be prescribed for children for selected conditions, precautions do apply.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:

  • allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue

  • blurred vision

  • fever, sore throat, swollen glands

  • hallucinations

  • muscle aches and pain

  • redness, blistering, peeling or loosening of the skin, including inside the mouth

  • swelling or pain around eyes

  • unusual bleeding or bruising

  • unusually weak or tired

  • worsening of mood, thoughts or actions of suicide or dying

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • clumsiness or unsteadiness

  • constipation or diarrhea

  • headache

  • hiccups

  • insomnia

  • loss of appetite or weight loss

  • nausea, vomiting

  • sensitivity to light

  • stomach cramps

What may interact with this medicine?

  • other seizure or epilepsy medicines

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Where should I keep my medicine?

Keep out of reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from light and moisture. Throw away any unused medicine after the expiration date.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

  • blood disorders or disease

  • kidney disease

  • liver disease

  • suicidal thoughts, plans, or attempt; a previous suicide attempt by you or a family member

  • systemic lupus erythematosus (SLE)

  • an unusual or allergic reaction to methsuximide, other medicines, foods, dyes, or preservatives

  • pregnant or trying to get pregnant

  • breast-feeding

What should I watch for while using this medicine?

Visit your doctor or health care professional for a regular check on your progress. Do not change brands or dosage forms of this medicine without discussing the change with your doctor or health care professional.

Wear a medical ID bracelet or chain, and carry a card that describes your disease and details of your medicine and dosage times.

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 dizzy or fainting spells, do not sit or stand up quickly, especially if you are an older patient. Alcohol can increase drowsiness and dizziness. Avoid alcoholic drinks.

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.

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.