Stopping Keppra (levetiracetam) suddenly can trigger seizures, even if you’ve been seizure-free for a long time. This is the most serious and immediate risk of abrupt discontinuation. If you’re thinking about coming off Keppra, or you’ve already missed doses, here’s what to expect and how the process is supposed to work.
The Biggest Risk: Breakthrough Seizures
Keppra has a relatively short half-life of about 7 hours, meaning the drug’s levels in your blood drop quickly once you stop taking it. Within 48 hours, roughly 93% of the drug has been cleared through your kidneys. That rapid drop is the problem. Your brain has adjusted to having the medication on board, and removing it abruptly can lower your seizure threshold, potentially triggering seizures that are more severe than the ones you had before starting treatment.
This isn’t a small theoretical risk. A meta-analysis of over 1,700 patients found that 46% experienced seizure recurrence after stopping antiepileptic drugs, with rates across studies ranging from 26% to 63% depending on the patient population. Those numbers include people who tapered off gradually under medical supervision, so the risk from stopping cold turkey is likely higher.
In rare cases, abrupt withdrawal can cause status epilepticus, a prolonged seizure that doesn’t stop on its own and requires emergency treatment. This is the scenario doctors are most concerned about when they stress the importance of tapering.
What Happens to “Keppra Rage” and Mood Side Effects
Many people taking Keppra experience irritability, anger, anxiety, or mood changes that are sometimes called “Keppra rage.” If these behavioral side effects are what’s driving your desire to stop, there’s good news: they typically resolve after the drug is out of your system.
In documented cases, patients who gradually tapered off Keppra saw improvements quickly. One patient noticed behavioral changes almost immediately during the taper and reported two weeks after fully stopping that she “cannot stop smiling.” Another patient had only a single mild episode of agitation after withdrawal and showed no further aggressive behavior over a seven-week observation period. These psychiatric side effects can resolve completely without needing any additional medications.
That said, the timeline varies. Some people feel noticeably different within days of their last dose, while others don’t see immediate improvement. In at least one documented case, a patient’s mood symptoms didn’t change right away after stopping. The pattern depends on your individual brain chemistry, how long you’ve been on the drug, and whether you have other conditions affecting your mood.
How Tapering Works
The recommended approach is a gradual dose reduction, not an abrupt stop. For adults and adolescents over 50 kg, the standard tapering schedule is to reduce the dose by 500 mg twice daily every two to four weeks. For children and smaller adolescents, the reduction is slower: no more than 10 mg/kg twice daily every two weeks. The entire process can take a few months depending on your starting dose.
This slow step-down gives your brain time to readjust. Each reduction slightly changes the balance of electrical activity in your brain, and spacing the reductions out minimizes the chance that any single step triggers a seizure. Your doctor will likely monitor you more closely during this period, and some will order an EEG to check your brain’s electrical patterns before or during the taper.
There is one exception to the gradual approach. If you develop a serious side effect like a severe skin reaction, your doctor may tell you to stop immediately, accepting the seizure risk as the lesser danger.
Who Can Safely Stop Keppra
Not everyone on Keppra needs to stay on it forever. The American Academy of Neurology recommends that discontinuation can be discussed once you’ve been seizure-free for at least two years. The best candidates tend to share a few characteristics: a single seizure type, a normal neurological exam, normal cognitive function, and an EEG that has normalized while on medication.
For children, the timeline is slightly shorter. Withdrawal can be considered after 18 to 24 months without seizures, provided an EEG doesn’t show epileptic activity. The AAN recommends tapering at a rate no faster than 25% of the dose every 10 to 14 days for pediatric patients.
One important consideration that often gets overlooked: if seizures do come back during or after withdrawal, there’s a small chance they won’t respond to medications the way they did before. For most people, restarting treatment controls seizures again, but this isn’t guaranteed. That risk is part of the conversation you need to have before beginning a taper.
What the Recurrence Risk Looks Like Long Term
The 30% to 50% overall relapse rate is an average across all epilepsy types and all antiepileptic drugs. Your individual risk depends heavily on the kind of epilepsy you have, how long you were seizure-free, and whether your underlying cause is still present. People with structural brain abnormalities or certain genetic epilepsy syndromes have higher recurrence rates than those whose seizures were provoked by a temporary cause.
Most seizure recurrences happen within the first year after stopping medication, with the highest risk concentrated in the first few months. If you make it through the first year without a seizure, your odds of staying seizure-free improve significantly. This is why doctors typically recommend extra caution during that window, including restrictions on driving depending on your local laws, and avoiding situations where a sudden seizure could be dangerous.
If you’ve been taking Keppra for a condition other than epilepsy, such as off-label use for anxiety or certain pain conditions, the seizure risk from stopping is lower but not zero if you’ve been on it long enough for your brain to adapt. The tapering approach still applies.