Question: how long does it take to get used to keppra?
Answer: It takes approximately 5.5 x elimination half-life for a medicine to be out of your system. Keppra has a plasma half-life in adults of 7 ± 1 hour and is unaffected by either dose or repeated administration. Therefore it can take about 44 hours (5.5 x 8 hours) for Keppra to be eliminated.