EvidenceAlerts

Kapur J, Elm J, Chamberlain JM, et al. Randomized Trial of Three Anticonvulsant Medications for Status Epilepticus. N Engl J Med. 2019 Nov 28;381(22):2103-2113. doi: 10.1056/NEJMoa1905795. (Original study)
Abstract

BACKGROUND: The choice of drugs for patients with status epilepticus that is refractory to treatment with benzodiazepines has not been thoroughly studied.

METHODS: In a randomized, blinded, adaptive trial, we compared the efficacy and safety of three intravenous anticonvulsive agents - levetiracetam, fosphenytoin, and valproate - in children and adults with convulsive status epilepticus that was unresponsive to treatment with benzodiazepines. The primary outcome was absence of clinically evident seizures and improvement in the level of consciousness by 60 minutes after the start of drug infusion, without additional anticonvulsant medication. The posterior probabilities that each drug was the most or least effective were calculated. Safety outcomes included life-threatening hypotension or cardiac arrhythmia, endotracheal intubation, seizure recurrence, and death.

RESULTS: A total of 384 patients were enrolled and randomly assigned to receive levetiracetam (145 patients), fosphenytoin (118), or valproate (121). Reenrollment of patients with a second episode of status epilepticus accounted for 16 additional instances of randomization. In accordance with a prespecified stopping rule for futility of finding one drug to be superior or inferior, a planned interim analysis led to the trial being stopped. Of the enrolled patients, 10% were determined to have had psychogenic seizures. The primary outcome of cessation of status epilepticus and improvement in the level of consciousness at 60 minutes occurred in 68 patients assigned to levetiracetam (47%; 95% credible interval, 39 to 55), 53 patients assigned to fosphenytoin (45%; 95% credible interval, 36 to 54), and 56 patients assigned to valproate (46%; 95% credible interval, 38 to 55). The posterior probability that each drug was the most effective was 0.41, 0.24, and 0.35, respectively. Numerically more episodes of hypotension and intubation occurred in the fosphenytoin group and more deaths occurred in the levetiracetam group than in the other groups, but these differences were not significant.

CONCLUSIONS: In the context of benzodiazepine-refractory convulsive status epilepticus, the anticonvulsant drugs levetiracetam, fosphenytoin, and valproate each led to seizure cessation and improved alertness by 60 minutes in approximately half the patients, and the three drugs were associated with similar incidences of adverse events. (Funded by the National Institute of Neurological Disorders and Stroke; ESETT ClinicalTrials.gov number, NCT01960075.).

Ratings
Discipline Area Score
Pediatric Hospital Medicine 7 / 7
Pediatric Emergency Medicine 7 / 7
Hospital Doctor/Hospitalists 7 / 7
Internal Medicine 7 / 7
Neurology 7 / 7
Emergency Medicine 6 / 7
Comments from MORE raters

Pediatric Emergency Medicine rater

This is good information to have; although, there is a small number in the paediatric age group. More is needed as opinion depends on what happened with the last one.

Pediatric Emergency Medicine rater

With thirty to 40% as children, there is equal efficacy among three AEDs and safety. The clinical trial adds another layer of evidence to use Levetiracetam.

Pediatric Hospital Medicine rater

This article is highly relevant to my practice. The statistics are clear and understandable, and the conclusions are precise.
Comments from EvidenceAlerts subscribers

Dr. John Burke (1/1/2020 11:46 AM)

60 minutes is unacceptably long to terminate status. The best course after failure of an adequate dose of benzos (lorazepem 4mg x2 or 10mg midazolam) is to RSI with propofol, followed by a propofol drip and concomitant initiation of IV anti-epileptic.