Remember to talk to your doctor about these risks.

QT shortening

Patients with a history of familial short QT syndrome should not be treated with BANZEL. Talk to your doctor if you are unsure if this affects your loved one, as BANZEL has been shown to reduce the QT interval.

Suicidal behavior and ideation

All medicines to treat seizures, including BANZEL, may cause suicidal thoughts or actions in a very small number of people—about 1 in 500. Call your doctor right away if you or your loved one experiences new or worsening symptoms of depression, unusual changes in mood or behavior, or thoughts or actions of suicide or self-harm, aggression, agitation, anger, anxiety or irritability. Other side effects may include feeling agitated or restless, panic attacks, trouble sleeping, acting on dangerous impulses, and an extreme increase in activity and talking (mania).

Additional Side effects

Taking BANZEL can cause side effects such as sleepiness or feeling tired or weak, difficulty with coordination, dizziness, and problems with walking or movement. Alcohol, in combination with BANZEL, may increase or worsen the side effects of sleepiness or dizziness.

Multi-organ hypersensitivity reactions

Call your doctor if your loved one experiences a rash, as this can be a sign of a more serious condition, such as multi-organ hypersensitivity reaction.

Status epilepticus

Status epilepticus is a medical emergency in which the patient is in a state of prolonged seizure. Call your doctor as soon as possible if you find your loved one in a state of prolonged seizure.

Drug interactions

BANZEL can interact with other medicines. Tell your doctor all the medicines taken by your loved one, including prescription and non-prescription medicines, vitamins, and herbal supplements, to discuss possible side effects.

The most common side effects of BANZEL include:


  • Headache
  • Dizziness
  • Tiredness
  • Sleepiness
  • Nausea
  • Vomiting

Tell your doctor about any side effect that bothers you or that does not go away. The list above does not include all of the possible side effects of BANZEL. For more information, ask your doctor or pharmacist.

To report suspected side effects, contact Eisai Inc. at 1-888-274-2378 or the FDA at 1-800-FDA-1088 or www.FDA.gov/medwatch.

For additional information about risks associated with BANZEL, read the Medication Guide and the Important Safety Information, and discuss it with your doctor.

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