How Zogenix Is Winning Big With Late-Stage Seizure Study

Zogenix Inc. (NASDAQ: ZGNX) shares made a solid gain on Thursday after the company announced positive results from its late-stage seizure trial.

Essentially, the company reported positive top-line results from its second confirmatory Phase 3 study (Study 1504) for its investigational drug, ZX008 (low-dose fenfluramine hydrochloride), for the treatment of children and young adults with Dravet syndrome.

The study results successfully met the primary endpoint and all key secondary endpoints, demonstrating that ZX008, at a dose of 0.5 mg/kg/day (maximum 20 mg/day), is superior to placebo when added to a stiripentol regimen.

As for the specifics, patients taking ZX008 achieved a 54.7% greater reduction in mean monthly convulsive seizures compared to placebo. The median reduction in monthly convulsive seizure frequency was 62.7% in the ZX008 group compared to 1.2% in placebo patients.

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ZX008 also demonstrated statistically significant improvement versus placebo in both key secondary measures, including patients with clinically meaningful reductions (>50%) in seizure frequency and longest seizure-free interval.

Professor Rima Nabbout, M.D., Ph.D., Department of Pediatric Neurology, Reference Center for Rare Epilepsies, Necker Enfants Malades Hospital, and Principal Investigator of Study 1504, commented:

These impressive study results show the significant impact the addition of ZX008 made in reducing the burden of convulsive seizures for patients who are not adequately controlled using stiripentol, the standard of care for the treatment of Dravet syndrome in Europe. If approved, ZX008 has the potential to be a transformative treatment for Dravet syndrome, a rare and serious form of epilepsy with few available treatment options.

Shares of Zogenix were last seen up about 17% at $54.05, with a consensus analyst price target of $54.00 and a 52-week range of $10.05 to $58.30.

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