Virkningen af Keppra anvendt alene blev undersøgt hos 579 patienter, som enten fik Keppra eller carbamazepin (et andet lægemiddel mod epilepsi) i op til to år.
The effectiveness of Keppra used on its own was studied in 579 patients, who received either Keppra or carbamazepine (another anti-epileptic medicine) for up to two years.