You should talk with your healthcare provider prior to taking levetiracetam XR if you have:
- Anemia or any other blood disorder
- Kidney disease, including kidney failure (renal failure)
- Any allergies, including allergies to food, dyes, or preservatives.
Also, let your healthcare provider know if you are:
- Pregnant or thinking of becoming pregnant (see Keppra XR and Pregnancy)
- Breastfeeding (see Keppra XR and Breastfeeding).
Make sure to tell your healthcare provider about all other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
(Click Precautions and Warnings With Levetiracetam XR to learn more, including information on who should not take the drug.)
Epilepsy is a brain disorder caused by recurring, brief changes in the brain's electrical system. These changes in brain activity can lead to a seizure (see Epilepsy Symptoms). It is not known exactly how levetiracetam XR works to prevent partial seizures in people with epilepsy. In fact, studies have shown that it does not work like any other seizure medication.
In one study, adding levetiracetam XR to other seizure medications (that people were already taking) reduced the frequency of partial seizures by up to 46.1 percent on average, compared to a reduction of only 33.4 percent when a placebo (a "sugar pill" with no active ingredients) was added.