Fintepla oral solution approved in the EU for adjunctive treatment of seizures associated with Lennox-Gastaut syndrome

The approval by the European Commission (EC) was based on safety and efficacy data from a global, randomized, placebo-controlled Phase III clinical trial, in 263 patients with LGS (aged 2-35 years), that demonstrated adjunctive fenfluramine at a dose of 0.7/mg/kg/day provided a significantly greater reduction in the frequency of drop seizures (p=0.001) compared to placebo. The most common treatment-emergent adverse events were decreased appetite, somnolence, fatigue, and pyrexia (fever). No cases of valvular heart disease or pulmonary arterial hypertension were observed.

Professor Rima Nabbout, MD, PhD, Professor of Paediatric Neurology at University Paris cité, APHP, Necker Enfants Malades, Institut Imagine, Paris, France, said: “LGS is a developmental and epileptic encephalopathy where seizures are frequent, inducing high level of trauma injuries and negatively impacting development and quality of life. Seizures are often resistant to currently available medications, making this approval especially important for the individuals affected and their families.”

LGS is a severe childhood-onset developmental and epileptic encephalopathy (DEE) characterized by multiple types of drug-resistant seizures with high morbidity, as well as serious impairment of neurodevelopmental, cognitive, and motor functions, affecting an estimated 2 in 10,000 people in European Union (EU). Seizures leading to falls ("drop attacks/seizures") are common in LGS and tonic seizures are a hallmark feature of this syndrome. In addition, convulsive seizures (e.g., generalized tonic-clonic [GTC] seizures) are also commonly observed and usually occur in later stages of LGS, but sometimes may precede core seizure types. In addition to being associated with bodily injury and hospitalizations, GTC seizures are a primary risk factor of sudden unexpected death in epilepsy (SUDEP). Patients with GTC seizures have an approximately 10-fold greater risk for SUDEP than patients with other seizure types.